影响致密砂岩储层裂缝分布的主控因素分析——以库车前陆盆地侏罗系—新近系为例

发布时间：2018-07-12 10:26

本文选题：致密砂岩 + 库车　；参考：《天然气地球科学》2017年02期

【摘要】：系统阐明致密砂岩储层裂缝发育的控制因素,是准确预测裂缝分布规律的重要基础。在对裂缝精细定量表征的基础上,系统分析了库车地区致密砂岩中裂缝分布的控制因素。研究区主要发育构造裂缝,裂缝发育程度除受岩性、岩石力学层、沉积微相及成岩相等内因控制以外,还受构造部位和异常高压等外因的控制。脆性矿物含量高、粒度细、孔隙度低、分选好的岩石有利于裂缝的发育;裂缝往往发育在能干性强的岩石中,其高度受岩石力学层厚度控制;单层厚度薄、累积厚度大、粒度细的沉积微相更有利于裂缝的发育;强压实强胶结致密型成岩相是裂缝发育的有利区;断裂附近及褶皱转折端是局部应力集中区,裂缝发育程度明显升高;异常高压降低了有效应力,促进岩石发生破裂。
[Abstract]:Systematically expounding the controlling factors of fracture development in tight sandstone reservoir is an important basis for accurate prediction of fracture distribution law. On the basis of the fine quantitative characterization of fractures, the controlling factors of fracture distribution in tight sandstone in Kuqa area are analyzed systematically. Structural fractures are mainly developed in the study area. The degree of fracture development is controlled not only by internal factors such as lithology, rock mechanics layer, sedimentary microfacies and diagenetic facies, but also by external factors such as structural position and abnormal high pressure. Brittle minerals are of high content, fine granularity, low porosity and good separation of rocks are conducive to the development of fractures. Fractures often develop in highly capable rocks, the height of which is controlled by the thickness of rock mechanics layer, the thickness of single layer is thin, and the accumulated thickness is large. Fine grain size sedimentary microfacies are more favorable for fracture development, strong compacted cemented dense diagenetic facies are favorable areas for fracture development, local stress concentration area is near the fault and fold turning point, and the degree of fracture development is obviously increased. Abnormal high pressure reduces effective stress and promotes rock fracture.
【作者单位】：东北石油大学黑龙江省普通高校科技创新团队"断裂变形、封闭性及流体运移";油气资源与探测国家重点实验室;中国石油勘探开发研究院石油地质实验研究中心;大庆油田有限责任公司第四采油厂;
【基金】：国家自然科学青年基金“基于分形理论和三维地质力学模拟定量预测亚地震断层”(编号:41502124) 中国博士后科学基金“亚地震断层定量预测及对注水开发的影响”(编号:2015M581424) 国家科技重大专项“前陆冲断带及复杂构造区油气成藏、分布规律与有利区评价”(编号:2016ZX05003-002) 国家自然科学基金重点联合基金“深层油气藏盖层封闭能力动态演化过程及完整性定量评价”(编号:U1562214)联合资助
【分类号】：P618.13

【相似文献】