摘要
以壁心、铸体薄片观察为基础,综合运用常规物性、阴极发光、黏土X衍射、地层测试等分析化验资料,对流沙港组一段储层发育特征及其控制因素进行研究。结果表明:压实作用与沉积作用造成的储集岩粒度和泥质杂基差异是物性的主要控制因素,局部强钙质胶结在压实作用的基础上导致储层物性进一步变差;有机酸溶蚀、早期烃类充注与超压保护通过增孔和保孔作用改善储层质量,对储层物性起建设性作用。储层粒度粗、厚度大、泥质杂基含量少,且处于近强压实区的A2、A4区发育最有利储层,次为湖底扇沉积区存在早期烃类充注和异常超压发育的A1区,而埋深大且处于强压实区的A3区储层物性相对最差。
Based on observation of sidewall coring and casting thin section, the reservoir characteristics of Liushagang 1 Member and their affecting factors were studied by some analysis data from routine petrophysical property, cathode luminescence, X diffraction of clay, formation test. Results show that(1) the difference between reservoir-rock grain size and muddy matrix created by both compaction and sedimentation is the main factor affecting petrophysical property, and compaction-based local calcium cementation may lead to these properties getting worse;(2) the organic-acid dissolution, early hydrocarbon filling, and overpressure protection may improve reservoir quality by pore enlargement and guard, which are constructive to petrophysical property; and(3) with coarse grain size, big thickness, and a little muddy matrix, the most favorable reservoirs are developed in A2 and A4 belts near strong compaction regions, the second sublacustrine-fan-facies reservoirs developed with early hydrocarbon filling and abnormal overpressure and in A1 belt, and the last ones with deeper burial depth and strong compaction in A3 belt, respectively.
出处
《天然气技术与经济》
2018年第3期10-13,共4页
Natural Gas Technology and Economy
基金
"十三五"国家重大科技专项(2016ZX05024-006)
关键词
储层特征
主控因素
成岩作用
流一段
涠西南凹陷
reservoir characteristics
main affecting factor
diagenesis
Liushagang 1 Member
Weixi'nan sag
