渤南低凸起下古生界碳酸盐岩潜山储层特征及控制因素

Reservoir characteristics and controlling factors of carbonate buried hill in the Lower Paleozoic of Bonan low uplift

杨一珉 罗健 徐云龙 李慧勇 侯明才 罗小平 6

成都理工大学沉积地质研究院，四川 成都 610059 成都理工大学油气藏地质及开发工程国家重点实验室，四川 成都 610059 伦敦大学皇家霍洛威学院，伦敦萨里 TW20 0EX 中国石化中原油田分公司勘探开发研究院，河南 濮阳 457001 中国海洋石油集团有限公司天津分公司，天津 300450 成都理工大学能源学院，四川 成都 610059

渤海湾盆地渤南低凸起潜山具有极好的勘探前景，但目前与其相关的研究尚不系统。文中运用测井、录井资料及实际生产数据，通过岩石薄片镜下观察及实测储层孔渗等实验测试手段，对渤南低凸起BZ28￣1构造带碳酸盐岩潜山储层岩石学特征、储集空间类型及储集物性特征进行了分析，并探讨了潜山有利储层形成的主控因素。结果表明：渤南低凸起潜山岩性主要为晶粒云岩，其次为晶粒灰岩、颗粒灰岩和颗粒云岩；储层储集空间以溶蚀孔洞为主，其次为裂缝，储层类型以裂缝￣孔隙复合型为主；储层整体以低孔、低渗储层为主；潜山有利储层的形成主要受区域沉积相、古岩溶作用、构造破裂作用、白云石化作用等控制，其中沉积相是有利储层形成的基础。

The buried hill of Bonan low uplift in Bohai Bay Basin has a high prospect for exploration, but the research is still not systematic at present. Using well logging, mud logging and actual production data, through test means such as the rock thin section microscopic observation and the measurement of reservoir porosity and permeability, the characteristics such as reservoir petrology, reservoir space types and reservoir physical property of BZ28-1structural belt of Bonan low uplift carbonate buried hill are analyzed, and the main control factors of favorable reservoir forming of buried hill are discussed in this paper. The results show that the lithology of the buried hill of Bonan low uplift is mainly crystalline dolomite, followed by crystalline limestone, granular limestone and granular dolomite. The reservoir space is dominated by dissolution caves, followed by fractures. The reservoir type is mainly fracture-pore composite. The reservoir in this area is mainly low porosity and low permeability. The formation of favorable reservoirs in buried hill is mainly controlled by regional sedimentary facies, paleo-karstification, tectonic fracture and dolomitization, among which the sedimentary facies is the basis for the formation of favorable reservoirs.

10.6056/dkyqt202004008