岩性油气藏 ›› 2019, Vol. 31 ›› Issue (2): 124–133.doi: 10.12108/yxyqc.20190214

• 勘探技术 • 上一篇    下一篇

磨溪龙王庙组碳酸盐岩储层多尺度离散裂缝建模技术及其应用

王蓓1,2, 刘向君1, 司马立强1, 徐伟2, 李骞2, 梁瀚2   

  1. 1. 西南石油大学 地球科学与技术学院, 成都 610500;
    2. 中国石油西南油气田分公司勘探开发研究院, 成都 610041
  • 收稿日期:2018-09-19 修回日期:2018-11-25 出版日期:2019-03-21 发布日期:2019-03-21
  • 通讯作者: 刘向君(1969-),女,博士,教授,博士生导师,主要从事岩石物理及岩石力学、应用地球物理以及石油工程交叉学科领域的教学与研究工作。Email:13880093092@163.com。 E-mail:13880093092@163.com
  • 作者简介:王蓓(1989-),女,西南石油大学在读博士研究生,工程师,研究方向为开发地质。地址:(610041)四川省成都市高新区天府大道北段12号石油科技大厦。Email:wangbei08@petrochina.com.cn
  • 基金资助:
    国家“十三五”重大科技专项“四川盆地大型碳酸盐岩气田开发示范工程”（编号：2016ZX05052）和中国石油重大科技专项“西南油气田天然气上产300亿立方米关键技术研究与应用”（编号：2016E-06）联合资助

Multi-scale discrete fracture modeling technology for carbonate reservoir of Longwangmiao Formation in Moxi area and its application

WANG Bei1,2, LIU Xiangjun1, SIMA Liqiang1, XU Wei2, LI Qian2, LIANG Han2   

  1. 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
    2. Research Institute of Exploration and Development, PetroChina Southwest Oil & Gas Field Company, Chengdu 610041, China
  • Received:2018-09-19 Revised:2018-11-25 Online:2019-03-21 Published:2019-03-21

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摘要： 在以大斜度井和水平井为主要开发井型的缝洞型碳酸盐岩气藏中，要想获取裂缝在井点不同空间位置的产状较困难，裂缝精细描述存在不准确性，这些均影响了对气藏渗流通道的刻画，制约了边水气藏的科学、均衡开发。以磨溪龙王庙组碳酸盐岩储层为例，利用岩心照片、FMI成像测井、叠前地震各向异性裂缝预测和不连续性检测以及动态监测等资料，在大斜度井、水平井裂缝定性识别的基础上，定量表征了裂缝产状、开度、密度、孔隙度等参数，再结合所获取裂缝参数建立多尺度非结构化网格离散裂缝模型，明确了气藏高、低渗区域分布，优势水侵通道和水侵方式。结果表明：在磨溪龙王庙组气藏离散裂缝模型中，大尺度和中小尺度裂缝均较发育，高渗区呈连片状广泛分布；发育于气藏外围4个方向的9条边水水侵的高渗通道，表现为沿裂缝水窜型和沿溶蚀孔洞均匀推进型2种水侵方式。该方法及研究结果对同类特大型超压有水深层碳酸盐岩气藏裂缝精细描述、水侵优势通道刻画和水侵模式建立等理论和技术研究均具有借鉴意义。

关键词: 大斜度井和水平井, 裂缝识别, DFM裂缝建模, 高、低渗区域分布, 水侵优势通道, 水侵方式, 四川盆地

Abstract: In fractured-cavern carbonate gas reservoirs with highly deviated wells and horizontal wells as the main development wells,it is difficult to obtain the fracture occurrence at different spatial locations of well points,and the precise description of fractures is inaccurate,which all influence the characterization of seepage channels in gas reservoirs and restrict the scientific and balanced development of edge water gas reservoir. Taking carbonate reservoir of Longwangmiao Formation in Moxi area as an example,based on qualitative identification of fractures in highly deviated wells and horizontal wells,the data of core photos,FMI imaging logging,prestack seismic anisotropic fracture prediction and discontinuity detection,dynamic monitoring,were used to quantitatively characterize the fracture occurrence,opening,density and porosity. Then combined with the obtained fracture parameters,a multi-scale unstructured grid discrete fracture model was establish to determine the regional distribution of high and low permeability gas reservoir,dominant water invasion channels and water invasion patterns. The results show that the large-scale and small-scale fractures are well developed in the discrete fracture model of gas reservoir in Longwangmiao Formation,and the high permeability zones are widely distributed in the form of continuous flakes. There are nine high permeability channels with edge water invasion developed in four directions around the gas reservoir,in which there are two types of water invasion:water channeling along fractures and uniformly advancing along dissolved cavities. This method and research results have reference significance for theoretical and technical research of the same super-large overpressure deep carbonate gas reservoirs, such as fine description of the fractures,characterization of the dominant channel of water invasion and establishment of water invasion model.

Key words: highly deviated wells and horizontal wells, fracture identification, DFM fracture modeling, distribution of high and low permeability zones, water invasion dominant channel, water invasion pattern, Sichuan Basin

中图分类号: 

  • TE319
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