合川气田须家河组低孔隙度低渗透率砂岩储层有效性测井评价  

Effectiveness Log Evaluation of Low Porosity and Low Permeability Sand Reservoir in Xujiahe Group of Hechuan Gas Field

作　　者：司马立强[1] 姚军朋[1] 黄丹[1] 袁龙[1] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500

出　　处：《测井技术》2011年第3期254-258,共5页Well Logging Technology

摘　　要：合川气田须二段气藏属低孔隙度低渗透率或特低孔隙度特低渗透率储层,储层有效性评价是测井评价的重点和难点。合川气田须二段储集岩填隙物成分复杂,岩性细,储层物性差,地层水矿化度高,水膜厚度大,这些特征对储层有效性影响很大。结合分析化验资料、常规测井与特殊测井资料综合分析,获得了储层孔喉结构、储集性、渗滤性和裂缝发育程度等4项评价指标,对储层有效性进行综合评价,确定出研究区气井的产能级别。对合川地区38口井的实际应用表明,储层有效性评价结果与各井气、水产能类型具有良好的一致性,也为开发生产提供了重要的决策依据。Xujiahe Stage Second Segment （Tx2） formation is a low porosity and permeability or extra low porosity and permeability sand reservoir in Hechuan gas field. Logging evaluation of the reservoir effectiveness is important and difficult. Analyses results about this reservoir show that： interstitial material of Xujiahe Stage Second Segment （Tx2 ） reservoir rock is complicated and lithology is fine; reservoir properties are not good; formation water is high salinity and there is thick water film; they have great impacts on the reservoir effectiveness. Combining test data with the conventional and special logging data provides four indicators, such as reservoir pore structure, reservoir characteristics, percolation and fracture development. Then they were com- prehensively used to evaluate the reservoir effectiveness, and the evaluation indicators can be used to determine production capacity of gas wells in the studied area. Practical application in 38 wells of Hechuan area shows that reservoir effectiveness evaluation result has good consistency with different well capacity types, and it provides important decision-making basis for oil production.

关 键 词：测井解释 储层有效性 孔喉结构 储渗性 裂缝有效性 综合评价 

分 类 号：P631.84[天文地球—地质矿产勘探]