摘要
针对苏里格气田东区致密储层受多期不同类型沉积、成岩作用及构造等因素影响,储集空间小、非均质性强、储层孔隙类型结构和测井响应复杂等问题,开展该区致密储层岩石物理相研究,在此基础上确定含气层下限与评价标准。研究区可划分出石英支撑强溶蚀粒间孔、溶孔型,岩屑石英砂岩溶孔型和杂基微孔致密型3类岩石物理相,并建立了致密储层岩石物理相评价划分标准。利用不同岩石物理相物性分析、试气、测井及气测全烃资料,建立了该区致密储层不同岩石物理相含气层类别下限与评价标准。不同岩石物理相含气层残余气饱和度及其差异小,而剩余可动气饱和度及其差异相对较大,相应的测井响应参数变化较大。利用所建立的含气层下限和评价标准,对目的层进行细分层段的精细对比与评价,对研究区46口井目的层段致密储层进行复查和重新评价,新增不同类别岩石物理相含气层335个,新增含气层厚度为1 095.4 m,其中新增Ⅰ类岩石物理相气层81个,新增有效厚度为294 m。
The tight reservoir in the eastern Sulige is influenced by multi-period sedimentary, diagenesis and structure. And, it has small space, strong anisotropism, complex pore structure and complicated log response. The paper analyzes the remaining gas in invaded zone and offers the contrast between the limit and assessment of gas-bearing formations, influenced by saturation of residual and remaining movable gas. The research presents lower differences of residual gas saturation and greater differences of remaining movable gas saturation in tight reservoir of classified petrophysical phase. So, the assessment of gas formations in classified petrophysical phase can be established based on lithology, physical property, logging curves and hydrocarbons response to remaining movable gas in different types of gassy formations. The re-evaluation in tight reservoir is made among 46 wells in the study region. It is recommended to add gas formation, bad gas formation and gas reservoir section to test, which is beneficial to tight reservoir to reach a high output.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2013年第5期23-27,32,共6页
Petroleum Geology and Recovery Efficiency
基金
中国石油天然气股份有限公司科学研究与技术开发项目"致密气藏测井釆集处理与评价技术研究"(2010E-2304)
国家自然科学基金项目"变形介质复杂储层应力敏感性的岩石流变学机理及动态模型"(51104119)
关键词
岩石物理相分类
致密储层
泥浆侵入带剩余气变化
含气层下限
气层评价
测井解释
classification of petrophysical facies
tight reservoir
change of remaining gas in invaded zone
limit and assessment of gas formation
evaluation of gas reservoir
log interpretation
