准噶尔盆地车排子地区下侏罗统八道湾组砂岩储层成岩作用与孔隙演化

发布时间：2018-02-25 05:26

  本文关键词： 孔隙演化 成岩序列 成岩阶段 八道湾组 车排子地区 准噶尔盆地　出处：《东北石油大学学报》2017年01期 　论文类型：期刊论文

【摘要】：准噶尔盆地车排子地区八道湾组油气勘探取得重大突破,但该地区成岩作用方面的研究还比较薄弱。根据岩石薄片及扫描电镜观察,确定车排子地区成岩作用类型及成岩事件发生顺序;根据阴极发光测试,确定方解石胶结物期次、石英次生加大发育程度及高岭石分布特征;根据X线衍射,确定黏土矿物组成及各矿物成分体积分数;根据氧同位素测试,确定自生方解石形成温度;采用反演回剥法研究储层孔隙演化过程。结果表明:储层主要经历压实作用,方解石、石英、黄铁矿等的胶结作用及长石和石英的溶蚀作用。方解石胶结物形成温度主要介于40~85℃,大致对应早成岩阶段A期的晚期至早成岩阶段B期;黏土矿物以高岭石为主,主要来源于长石的溶蚀;储层孔隙演化过程可以划分为3个阶段,即快速压实阶段、压实胶结阶段及压实溶蚀阶段。该研究成果为车排子地区八道湾组地层油气勘探提供地质依据。
[Abstract]:Major breakthrough has been made in oil and gas exploration of Badaowan formation in Chepaizi area, Junggar Basin, but the study on diagenesis in this area is relatively weak. The diagenesis types and diagenetic events in Chepeizi area are determined. According to the cathodoluminescence test, the calcite cementation period, the secondary growth of quartz and the distribution characteristics of kaolinite are determined. The mineral composition of clay and the volume fraction of each mineral component were determined; the formation temperature of authigenic calcite was determined according to oxygen isotope test; the pore evolution process of reservoir was studied by inverse stripping method. The results showed that the reservoir mainly experienced compaction. The cementation of calcite, quartz, pyrite, etc., and the dissolution of feldspar and quartz. The formation temperature of calcite cementation is mainly between 40 鈩，

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