储层致密化影响因素分析与有利成岩相带预测——以马岭油田长8油层组砂岩储层为例

doi:10.3969/j.issn.1673-8926.2017.01.008

岩性油气藏 ›› 2017, Vol. 29 ›› Issue (1): 59–70.doi: 10.3969/j.issn.1673-8926.2017.01.008

储层致密化影响因素分析与有利成岩相带预测——以马岭油田长8油层组砂岩储层为例

王猛^1,2,3, 曾明³, 陈鸿傲⁴, 杨刚⁴, 徐绩芳⁴, 邱海滨⁴, 郭红光⁴, 王家敏⁴

1. 油气藏地质及开发工程国家重点实验室·西南石油大学, 成都 610500;
2. 西南石油大学地球科学与技术学院, 成都 610500;
3. 中国石油长庆油田分公司第二采油厂, 甘肃庆城 745100;
4. 中国石油集团测井有限公司长庆事业部, 西安 710021

收稿日期:2016-06-27 修回日期:2016-09-07 出版日期:2017-01-21 发布日期:2017-01-21
第一作者:王猛(1988-),男,西南石油大学在读博士研究生,研究方向为非常规油气地质与油气田开发。地址:(610500)四川省成都市新都区西南石油大学地球科学与技术学院。Email:wangmeng_swpu@126.com
通信作者: 曾明(1981-),男,工程师,主要从事低渗透油田开发及相关技术方面的研究工作。Email:zming_cq@petrochina.com.cn。
基金资助:
国家重大科技专项“中国大型气田形成条件、富集规律及目标评价”（编号:2011ZX05007-004）资助

Influencing factors of tight reservoirs and favorable diagenetic facies： a case study of Chang 8 reservoir of the Upper Triassic Yanchang Formation in Maling Oilfield,Ordos Basin

WANG Meng^1,2,3, ZENG Ming³, CHEN Hong'ao⁴, YANG Gang⁴, XU Jifang⁴, QIU Haibin⁴, GUO Hongguang⁴, WANG Jiamin⁴

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;
2. School of Geoscience and Technology, Southwest Petroleum University, 610500 Chengdu, China;
3. No. 2 Oil Production Plant, PetroChina Changqing Oilfield Company, Qingcheng 745100, Gansu, China;
4. Changqing Division of Logging Limited Company, CNPC, Xi'an 710021, China

Received:2016-06-27 Revised:2016-09-07 Online:2017-01-21 Published:2017-01-21

摘要/Abstract

摘要： 马岭油田延长组长8 油层组属典型的低孔、低渗致密砂岩储层，分析成岩因素对储层致密化的影响，并预测有利成岩相带发育区对寻找有利储层勘探区具有指导意义。通过岩心、铸体薄片、高压压汞、扫描电镜、X 射线衍射等分析，研究了长8 油层组储层岩石学、孔隙结构、物性特征，探讨了不同成岩作用因素对储层物性的影响，进而建立了成岩相划分标准，预测了有利成岩相带展布。结果表明：长8 油层组为低孔、低渗储层，孔喉结构微观非均质性强；砂岩经历了中—强压实、中—强胶结和弱溶蚀成岩改造，压实、硅质胶结及碳酸盐胶结等作用共同促使了储层致密化，伊利石的存在造成了渗透率降低，绿泥石环边胶结、烃类侵位、长石及岩屑的溶蚀作用对储层发育均具有建设性作用，高岭石指示了次生孔隙的形成，但会对渗透率造成破坏；划分出6 种成岩相，其中绿泥石-自生石英胶结相与溶蚀相等有利成岩相纵向上发育于长8₁、长8₂ 小层上部与中部，平面上呈透镜状、条带状，与水下分流河道、河口坝砂体具有较好的匹配关系，长8₁小层有利成岩相发育区规模远大于长8₂小层。

Abstract: The Chang 8 reservoir of the Upper Triassic Yanchang Formation in Maling Oilfield is characterized by tight sandstone of typical low porosity and low permeability. To analyze the influences of diagenesis on reservoir densification and evaluate favorable diagenetic facies, based on the data of core observation, cast thin section, mercury injection test, scanning electron microscopy and X-ray diffraction test, the reservoir petrology, pore structure and physical properties of Chang 8 reservoir were studied, the influence of different diagenesis on reservoir quality was discussed, a standard of diagenetic facies division was established, and the distribution of favorable diagenetic facies area was evaluated. The Chang 8 sandstone is characterized by strong microscopic heterogeneity and striped- shaped or lentoid, which have a good matching with subaqueous distributary channel and mouth bar sand bodies. The sandstone experienced medium to strong compaction, medium to strong cementation, and weak dissolution. The compaction, siliceous cementation and carbonate cementation led to reservoir densification synthetically. The presence of illite resulted in permeability reduce; chlorite coating, hydrocarbon emplacement, feldspar and debris dissolution contribute to reservoir development; kaolinite indicates the formation of secondary porosity, while it would cause permeability damage. The sandstones were divided into six types of diagenetic facies, among these diagenetic facies, chlorite- authigenic quartz cementation facies and dissolution facies are favorable diagenetic facies, which developed in the upper and middle of large scale Chang 8₁ and small scale Chang 8₂ reservoir.

中图分类号:

TE122.2

王猛, 曾明, 陈鸿傲, 杨刚, 徐绩芳, 邱海滨, 郭红光, 王家敏. 储层致密化影响因素分析与有利成岩相带预测——以马岭油田长8油层组砂岩储层为例[J]. 岩性油气藏, 2017, 29(1): 59–70.

WANG Meng, ZENG Ming, CHEN Hong'ao, YANG Gang, XU Jifang, QIU Haibin, GUO Hongguang, WANG Jiamin. Influencing factors of tight reservoirs and favorable diagenetic facies： a case study of Chang 8 reservoir of the Upper Triassic Yanchang Formation in Maling Oilfield,Ordos Basin[J]. Lithologic Reservoirs, 2017, 29(1): 59–70.

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储层致密化影响因素分析与有利成岩相带预测——以马岭油田长8油层组砂岩储层为例

Influencing factors of tight reservoirs and favorable diagenetic facies： a case study of Chang 8 reservoir of the Upper Triassic Yanchang Formation in Maling Oilfield,Ordos Basin

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