Lithologic Reservoirs

In view of the present situation of research ideas of seismic-geology integration and petroleum seismogeology research, the six scientific problems of petroleum seismogeology including concept, subdisciplines and their definition, research ideas and approach and key technologies, theory and experiment basis, research scale and relations with related disciplines are discussed. It is pointed out that with the further development of geophysical exploration technologies, maybe using petroleum seismogeology to find reservoirs accurately and carry out high efficiency development can become true.

Multi-source hydrocarbon generation and accumulation of plateau multiple petroleum system in Qaidam Basin

YUAN Jianying， FU Suotang， CAO Zhenglin， YAN Cunfeng，ZHANG Shuichang， MA Dade

2011, Vol.23(3): 7–14 Abstract ( 443 ) PDF (1050 KB) ( 605 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.002

Undergoing an evolution cycle of Palaeozoic “block-trough” andMesozoic “basin-orogenic belt”, Qaidam Basin developed four different types of source rocks, including Carboniferous marine-continental transitional facies, Jurassic limnetic facies, Tertiary saline facies and Quaternary salt lake facies, and formed a compound oil/gas system of “multisource, multi-depression, and multi-kitchen”, which has a characteristic of “multi-factor controlling hydrocarbon-charging, multi-structure and multi-type-trap reservoir formation, multi-layer oiliness”. Based on the research of reservoir forming mechanism, it is revealed that different types of reservoir can form outside the source rock, on slope, in late Himalayan traps and deep layer, which can guide the exploration and bring newdiscoveries and progress.

Geologic characteristics of particular gas reservoir in Yakai Gasfield, Tahe Oilfield

GUO Suhua， YUAN Yunfu， ZHENG Xiaojie

2011, Vol.23(3): 15–18 Abstract ( 395 ) PDF (686 KB) ( 596 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.003

YakaiGasfield is a typical compound sandstone gas reservoir controlled by structure-lithology, and characterized by lowporosity and lowpermeability, gas/water inversion and abnormal formation pressure. Comprehensive study shows that the gas/water relation is influenced not only by structure, but also by sand body piching and physical property changing, so it is a relatively complex particular gas reservoir. There exist two types of abnormal gas/water relation in this gas reservoir, and the forming reason and distribution areas of these two types of gas/water relation are analyzed. It is considered that there developed favorable stratigraphic-lithologic traps in the northwestern area of the gas reservoir. Two wells deployed in the northwestern area have obtained commercial oil and gas flow, and the further rolling exploration extension direction is pointed out.

Study on sedimentary microfacies of Chang 81 reservoir of Yanchang Formation in Zhen 53 well field

QU Chunxia，ZHANG Yongqiang， LIN Yanbo， WANG Xuanru， YANG Weiguo

2011, Vol.23(3): 19–22 Abstract ( 497 ) PDF (670 KB) ( 455 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.004

Chang 8 reservoir in Zhen 53 well field is one of the key horizons for exploration, evaluation and development in Zhenbei region, Ordos Basin. Based on core description and well logging data analysis, it is considered that the main sandstone in the studyarea is feldspathic litharenite, and the reservoir ismainlydelta front. Themain sedimentarymicrofacies include subaqueous distributary channel, mouth bar and distal bar. The subaqueous distributary channel sands and mouth bar constitute the dominated reservoir. The relationship between sedimentarymicrofacies and reservoir physical property is analyzed. The result shows that the reservoir physical property is controlled by sedimentarymicrofacies, and the subaqueous distributarychannel is the favorablemicrofacies.

Study on exploration potential of deep natural gas in Liaohe Depression

ZHOU Xuhong， LI Jun， WANG Yanshan， ZHAO Jia， LI Dexing

2011, Vol.23(3): 23–28 Abstract ( 408 ) PDF (632 KB) ( 414 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.005

The organic matter abundance, type, maturity, gas generation property and intensity of different source rocks in Liaohe Depression are studied. The result shows that the types of proved natural gas are mainly bio-thermo-catalytic transitional zone gas and low temperature pyrolysis gas, while pyrolysis gas and high temperature pyrolysis gas rarely exist, which is not consistent with the thermal evolution degree of source rocks in Liaohe Depression. The depressions where exist high thermal evolution and high hydrocarbon generation intensity should be rich in natural gas with relatively higher maturity. Based on the analysis of deep tectonic settings and reservoir conditions of several important regions, it is supposed that these regions should be in the interior of gas kitchen or directly contact with gas source rocks, thus, they has excellent conditions for reservoir forming and will be the target areas for the further exploration.

Control of base level cycles on reservoir macroscopic heterogeneity: A case study from the second member of Shanxi Formation in eastern Ordos Basin

LI Junwen

2011, Vol.23(3): 29–34 Abstract ( 477 ) PDF (1038 KB) ( 541 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.006

The second member of Shanxi Formation consists of a suite of thin interbedded sandstone, mudstone and coal bed in eastern Ordos Basin. It has strong reservoir heterogeneity and is obviously influenced by the acceptable spacesedimentary supply ratio in base level cycle process. Based on the division and contrast of the different base level cycles of the second member of Shanxi Formation, the high resolution sequence stratigraphic framework is set up. Through analyzing the relationship between the cycle process of short-termbase level and physical properties of the reservoir, three reservoir heterogeneity models of reservoir physical properties are established. The macroscopic heterogeneities of the middle-term base level cycles are described by means of the parameters such as sand density,drilling ratio and permeability variation coefficient. The result shows that the reservoir heterogeneity of the middle-term cycles formed in the early and middle period of the rising of the long-term base level cycle is weak, and it is strong from the late period to declining period.

Sequence stratigraphy of Lower Triassic Feixianguan Formation in Fuling area

YANG Yingying， LI Guorong， GUO Chuan， LI Wenmao

2011, Vol.23(3): 35–39 Abstract ( 495 ) PDF (875 KB) ( 611 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.007

According to the fundamental principle of sequence stratigraphy, based on the analysis of rock type, sedimentary cycles identified fromlog curves and superposition styles, Lower Triassic Feixianguan Formation in Fuling area is divided into two third-order sequences, eleven fourth-order sequences and twenty fifth-order sequences.Furthermore, the third-order sequence and high-frequency sequence stratigraphic framework are established through the control action of key interface and the control action of low-frequency sequence on high-frequency sequence.

Influence of left-lateral slip on structural form in Shiwu Oilfield and it’s petroleum geological significance

GAN Xueqi， QIN Qirong， SU Peidong， FAN Zuochun， SONG Wenyan， CAI Ye

2011, Vol.23(3): 40–43 Abstract ( 476 ) PDF (1432 KB) ( 417 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.008

The tectonic movement of left-lateral slip in Shiwu Oilfield began from the depositional stage of Shahezi Formation to the last depositional stage of Yingcheng Formation. It became the most intense in the last depositional stage of Denglonku Formation and formed three press-slip zones to the northeast including Xiaokuan strike-slip zone. Three dimensional seismic study shows that the strike-slip tectonic style in Shiwu Oilfield is not simply a slip, but slip in the beginning and extension in the end or slip in the beginning and pressing development in the end, and there are some kinds of tectonic styles, such as negative flower, “F” type, anti-“Y” type and positive flower. The tectonic styles produced by the movement of left-lateral slip not only control the development of the deposition and sedimentation centre, but also are meaningful to the petroleum migration and accumulation.

Reservoir characteristics and influencing factors of Permian Wutonggou Formation in eastern slope of Jimusar Sag, Junggar Basin

SUN Jing， WANG Bin， XUE Jingjing

2011, Vol.23(3): 44–48 Abstract ( 443 ) PDF (1367 KB) ( 593 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.009

Based on the basic theory and research methods of reservoir geology, the drilling, logging and testing data are used to analyze the reservoir characteristics and influencing factors of Permian Wutonggou Formation in eastern slope of Jimusar Sag, Junggar Basin. The porosity is relatively high, and the permeability is relatively low. The middle pore-thin throat is the main pore throat type, and the connectedness is relatively poor. The major influencing factors of reservoir physical properties are sedimentary facies and diagenesis. Compaction is the main factor for reducing pores, and cementation is the main cause for the low permeability. The favorable zones for high-quality reservoir development are braided channel of braid river delta plain and subaqueous distributary channel of front.

Characteristics and evaluation of carbonate buried hill inner cap rock in Jizhong Depression

WU Xingning， LV Yuzhen， TIAN Jiqiang， GUO Yongjun

2011, Vol.23(3): 49–54 Abstract ( 543 ) PDF (717 KB) ( 627 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.010

Based on the observation of core and thin section, experimental analysis and well logging interpretation, it is considered that Yangzhuang Formation, Hongshuizhuang Formation and Mantou Formation are the main carbonate buried hill inner cap rocks fromChangcheng systemto Ordovician in Jizhong Depression. The lithology of the cap rock is mainly argillaceous rock, followed by argillaceous dolomite, argillaceous limestone and dense dolomite or limestone. Both the porosity and permeability are low. The essential macroscopical controlling factors for the cap rock are lithology, shale content and distribution scale, while the microcosmic controlling factors are breaking pressure, porosity and permeability, envelop coefficient etc. Based on the above factors, the carbonate buried hill inner cap rock in Jizhong Depression is divided into four types. Yangzhuang Formation is evaluated as type Ⅲ （middling cap rock）, Hongshuizhuang Formation is evaluated as typeⅡ （better cap rock）, andMantou Formation is evaluated as typeⅠ（best cap rock）.

Study on physical property of Chang 6₁¹ reservoir in Wangyao area, Ansai Oilfield

WANG Fang， ZHANG Chunsheng， XIAO Menghua， LI Li， ZHAO Enzhang

2011, Vol.23(3): 55–59 Abstract ( 515 ) PDF (760 KB) ( 439 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.011

Based on cast thin section, scanning electronic microscope and mercury penetration curves, the petrological characteristics, pore type, pore texture characteristics, reservoir properties and influencing factors of Chang 611 reservoir are systematically studied, and the favorable exploration target areas are pointed out. Through the comprehensive evaluation, it is considered that arkose is the main sandstone type of Chang 611 reservoir, and the pore types include primary intergranular pore, dissolved intergranular pore, dissolved intragranular pore and micro-fracture. The plane porosity of cast thin section of the sandstone reservoir ranges between 0.98% and 1.37%, the average throat radius is low, and the reservoir is of typical middle-low porosity and low permeability. The main factors that influence the reservoir properties are sedimentary environment and diagenesis.

Sedimentary characteristics of platform margin reef reservoir of Upper Permian Changxing Formation in Wubaiti area, eastern Sichuan

ZHENG Bo， ZHENG Rongcai， ZHOU Gang， WEN Huaguo

2011, Vol.23(3): 60–69 Abstract ( 460 ) PDF (1999 KB) ( 597 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.012

There are four facies belts developed in Changxing Formation inWubaiti area, including intraplatformtrough （deep water basin）, platform slope, platform margin reef flat and open platform. The platform marginal facies of continental shelf around intraplatform trough developed well. It is across entire eastern Sichuan and extends hundreds of kilometers, and it is the most important facies for seeking reef gas reservoir. The platformmargin reef in Wubaiti area can be divided into five subfacies, including reef base, reef core, reef crest, reef front and reef behind, amongwhich reef core and reef crest are the most favorable subfacies for the reservoir development. The reservoir rocks are mainly dolomite of reef and shoal facies and grain dolomite. Hummocky disorder reflection and chimney effect in seismic profile can be used to effectively predict reef reservoir. Dolomitization and dissolution are not only the key factors for controlling the forming of reef gas reservoir, but also the basis for forming high quality reef reservoir. The fracture raises the porosity and permeability of reservoir.

Study on formation mechanism of low resistivity gas bearing reservoir in Anyue-Hechuan area

GENG Yanfei， ZHANG Chunsheng， HAN Xiaofeng， YANG Dachao

2011, Vol.23(3): 70–74 Abstract ( 422 ) PDF (379 KB) ( 600 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.013

Reservoir in Anyue-Hechuan area is characterized by low porosity and low permeability. The complex micropore system and largr water film density lead to its high bound water saturation, which makes lots of highly mineralized formation brines formed particularly developed conductive network, forming the low resistivity characteristics. The reservoir lithology combining with physical property and water quality are applied to conduct the related calculation and experimental analysis, and explore the contributing factors of low resistivity gas bearing reservoir in Anyue-Hechuan area. The result shows that the factors of lowresistivity gas bearing reservoir in Anyue-Hechuan area include grain grade size, highly mineralized formation brines and high bound water saturation.

Carbonate diagenesis of the fifth member of Majiagou Formation in Fuxian area, Ordos Basin

WANG Xiaofen， YANG Xin

2011, Vol.23(3): 75–79 Abstract ( 455 ) PDF (1007 KB) ( 537 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.014

The Majiagou Formation in Fuxian area, Ordos Basin mainly deposited evaporation and tidal flat carbonate consisting of dolomites and gypsum-dolomite. The core observation, conventional thin section and casting thin section, X diffraction, carbon and oxygen isotope analysis combining with reservoir properties are used to study the carbonate diagenesis types and diagenetic environment of the fifth member ofMajiagou Formation in Fuxian area. The result shows that the carbonate rocks of the fifth member ofMajiagou Formation experienced the diagenetic environment of sea water, mixed water and fresh water. Dissolution and reflux dolomitization are constructive to the reservoir pore development, while mineral filling, dedolomitization and compaction-pressure solution are destructive.

Reservoir characteristics and main controlling factors of Jialingjiang Formation in southwestern Sichuan Basin

ZHANG Benjian， PEI Senqi， YIN Hong， YANG Yi

2011, Vol.23(3): 80–83 Abstract ( 461 ) PDF (626 KB) ( 644 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.015

The reservoir space, properties and main controlling factors of Lower Triassic Jialingjiang Formation in southwestern Sichuan Basin are studied. The result shows that Jialingjiang Formation developed multiple pay formation and reservoir-cap assemblages in the vertical. Because of the difference of developing degree of pore, cavity and fracture, the reservoirs of T1 j51, T1 j41and T1 j21-T1 j11are mainly fracture-pore reservoir, while the reservoirs of T1 j43、T1 j3 are mainly pore-fracture reservoir. The sedimentary facies controls the distribution of favorable lithofacies belt, physical property, the development of secondary pore and reservoir configuration. Dolomization and dissolution control the formation and distribution of secondary pore and cavity, while tectonismaffects the development of fracture. The Daxingchang and Han wangchang structures which are located in the Caledonian palaeohigh ramp region have favorable exploration potential .

Study on mixed sedimentary facies of Lower Cretaceous Albian in block A of Lower Congo Basin

ZHAO Can， ZHENG Rongcai， YU Shui， HAO Lihua， LUO Qinglin， LEI Guangming

2011, Vol.23(3): 84–90 Abstract ( 532 ) PDF (1520 KB) ( 428 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.016

Lower Cretaceous Albian in block AofLower CongoBasin deposited a set of carbonatemixed facies composed of terrigenous sand and mud. Based on regional geologic setting, logging geology, seismic data and thin section observation, the mixed deposition of Albian in the study area is analyzed. The research result shows that:①The profile structure is characterized by 4 types, including alternating deposits of terrigenous debris and carbonate, alternating deposits of terrigenous debris and diamicton, alternating deposits of carbonate and diamicton, and alternating deposits of diamicton themselves; ②A mixed deposition mechanism appropriate for the study area is proposed, called “discontinuity- overlapping” mixed deposition, and the mixed deposition model is established; ③With the seawater entering and the expansion of transgression, the Albian experienced mixed gentle slope, mixed restricted platform, mixed open platform and mixed continental shelf successively, and developed numerous sedimentarymicrofacies such as lime mud mound, sandy shoal, oolitic beach, bioclastic shoal, algal-clastic beach, subtidal static water mudstone and tempestite.

Numerical simulation analysis of interwell elastic wave field scattering characteristics

CHEN Keyang

2011, Vol.23(3): 91–96 Abstract ( 461 ) PDF (705 KB) ( 784 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.017

Forward numerical simulation is the key mean for analysis of interwell seismic wave field. The elastic wave field separation numerical simulation technology is used to carry out interwell wave field observation and its characteristic analysis on layered medium model with a cavity, and to study the scattering characteristics of interwell seismic wave field by changing the cavity size and compressional velocity and shear velocity. The numerical simulation result shows that the cavity increases the complexity of the interwell seismic wave field, and the difference between its size and the wavelength of the P-wave and Swave will raise complexwave field characteristics, such as multi-scattering and reflection wave. Compared with P-wave, the S-wave with smaller wave length ismore easily to raise the scattering wave field.

Prediction method of fracture in tight sandstone reservoir and its application in LZ area

WANG Zhiping， Qin Qirong， SU Peidong， FAN Xiaoli

2011, Vol.23(3): 97–101 Abstract ( 489 ) PDF (737 KB) ( 524 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.018

The reservoir in LZ area is tight sandstone reservoir, and fractures control the reservoir spaces and well capacity. Based on the analysis of structural features and evolution, combined with the fracture divided period coordination on the basis of outcrop data, the tectonic origin of fractures is analyzed. It is considered that the fractures developed in the study area mainly are shear fracture, tensional fracture, associated and derived fractures with faults. The constructional curvature method, paleotectonic stress field finite element modeling method and seismic discontinuity detection method are applied to predict the different fractures respectively. The weight is adopted to evaluate the prediction results. It is to establish the regression function between the accuracy of the prediction method and its influencing factors, and then define the weight coefficient through the prediction accuracy and calculate the weights of the different prediction results. Finally it can be used to predict the fracture development in tight sandstone reservoir in the study area. The well drilling data prove the good prediction effects.

Reservoir detection based on EMD and GHT

SHI Zhanzhan， HE Zhenhua， WEN Xiaotao， TANG Xiangrong

2011, Vol.23(3): 102–105 Abstract ( 524 ) PDF (704 KB) ( 577 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.019

Seismic signal is a complex non-stationary signal with a definite frequency bandwidth, and the waveform is affected by all the frequency components in the band. So a new method for reservoir prediction combined empirical mode decomposition with generalized Hilbert transform is proposed. The empirical mode decomposition （EMD） technique adaptively decomposes the seismic signals into a series of intrinsic mode functions （IMF）, and every IMF component is carried out the GHT calculation. By comparing the results with reservoir development in fixed wells, the IMF components sensitive to the reservoir are optimized and used to carry out reservoir prediction. The computational result of actual data shows that the method based on EMDand GHTcan be used to describe the reservoir accurately.

Experimental study on wetting transition water shutoff of horizontal well

OUYANG Chuanxiang， ZUO Chenxiao， ZHANG Zhijun， YUAN Hailong

2011, Vol.23(3): 106–109 Abstract ( 517 ) PDF (411 KB) ( 565 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.020

The phenomenon of excessive water production in the horizontal well is more than that in vertical well. Horizontal well is becoming universalized in the low-permeability oil and gas field development, but there are fewwater shutoff methods and techniques aimed at horizontal wells. By conducting the wetting transition experiment to typical rock sample, the applicable chemical gas wetting transition agent is determined and the thermal stability and formation compatibility are studied. The visual physical model of horizontal well water shutoff is established, the experiments before and after the using of wetting transition agent are compared, and water influx, water influx rate and water cut characteristic curves are obtained. The experimental result shows that gas wetting agent technology of horizontal well water shutoff can be used to delay breakthrough time, improve water free recovery and decline water cut.

Index system optimization and methods of water flood field development

LI Wuguang，YANG Shenglai，SHAO Xianjie，GUO Jin, MENG Hu，LIAO Changin

2011, Vol.23(3): 110–114 Abstract ( 419 ) PDF (313 KB) ( 486 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.021

In order to obtain a high recovery, a lot of indexs should be determined for water flood field development. In fact, the ultimate recovery is only affected by some factors that closely associate with the development process, which lead to the optimization of the indexs in the development process. Based on the theory of multiple regression analysis and theory of multiple correlation, taking the dependence between recovery and water flooding indexs and the correlation among indexs into account to optimize indices. Finally, some indexs with relative well dependence and little correlation are chosen as the optimization indices.

Experimental study on influence of CO₂ content on natural gas properties

WANG Jinchang，DU Jianfen，ZENG Zheng，GUO Ping，YUAN Lihe

2011, Vol.23(3): 115–118 Abstract ( 464 ) PDF (376 KB) ( 656 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.022

The constant composition expansion experiments on natural gas with CO2 content of 10%, 30%, 50%, 70%, 90%, 100% under three different temperatures （20 ℃, 30 ℃, 40 ℃） are conducted respectively. The results showthat with the CO2 content increasing from10% to 100%, the critical temperature of natural gas samples increases from - 69.86℃ to 31.4 ℃, and the critical pressure increases from 4.85 MPa to 7.38 MPa. When the temperature and pressure is constant, with the increasing of CO2 content in natural gas, the relative volume of natural gas samples shows an increase, and with the decreasing of pressure, the volume expansion lawof natural gas samples with different CO2 content shows a similar phenomenon in the supercritical CO2 characteristics. This cognition is significant for the further study on oil displacement by mixture of CO2 and natural gas.

Microscopic simulation of relative permeability curves in polymer flooding

ZHOU Congcong

2011, Vol.23(3): 119–123 Abstract ( 452 ) PDF (474 KB) ( 520 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.023

The relative permeability curve in polymer flooding is the important data for forecasting development indicators. A three-dimensional and quasi-static network model is established based on the percolation theory. Based on Carreau model, viscoelastic polymer microscopic seepage mechanismis simulated.Water flooding and polymer flooding seepage mechanism are simulated by using pore network model, and the relative permeability curves are obtained. The calculated result coincides with the experimental results. The result shows that pore network model can display the influence of capillary pressure. The relative permeability of polymer is lower than that of water phase in conventional oil/water flooding at the same water saturation, and residual oil saturation after polymer flooding is lower than water flooding. The model result indicates that pore network model can be used to simulate the relative permeability curve in polymer flooding.

Experimental study on oil displacement by injecting viscosity reducing agent in Jiang 37 heavy oil field

CHE Hongchang

2011, Vol.23(3): 124–128 Abstract ( 512 ) PDF (352 KB) ( 475 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.024

Aiming at the serious sand production situation in the process of steam stimulation in Jiang 37 heavy oil field, an experimental study on oil displacement by injecting surfactant for viscosity reduction is conducted. Surfactants screening result shows that a distributed viscosity reducing agent called FPS-H has a good compatibility with produced water from Jiang 37 heavy oil field, the interfacial tension of oil /water could be lowered down to 0.05 mN/m, and the viscosity reduction rate through emulsion could be upped to 92.1%. The optimum parameters of FPS-H flooding, including injection amount of 0.5 PV, injection rate of 1.0mL/min, injection method of 0.5 PV FPS-H plus continuous water flooding and injection temperature ofwater below50℃, are determined in the experimental results of oil displacement.

Development plan adjustment and optimization of Chang 4+5 reservoir in Geng 43 well field in Puziwan area

NIE Haifeng， DONG Liquan， DONG Wei， XIE Shuang， TAN Bei

2011, Vol.23(3): 129–132 Abstract ( 525 ) PDF (475 KB) ( 605 )

doi: https://doi.org/10.3969/j.issn.1673-8926.2011.03.025

In the development process of Chang 4+5 reservoir in Geng 43 well field in Puziwan area, there exist many problems such as rapid decline of deliverability in some wells, serious flooding, imperfect flooding pattern and non-well network control in local. In order to control the production decline effectively and improve flooding network, the dynamic analysis and numerical simulation study are carried out, and it is concluded that comprehensive regulated objects are remaining oil enrichment area and layer system. So the relevant adjustments are conducted to development layers and well pattern, and the optimum programis put forward: reperforating and plugging holes in the areas where has a higher movable remaining reserves or thicker effective pay thickness in some wells; converting low-yield and high water cut oil wells to injection wells; drilling infillers in the remaining oil enrichment area. The forecast result of the program shows that oil recovery increases remarkably under the optimum program.