川东北温泉井及邻区长兴组生物礁储层特征研究  

Characteristics of reef reservoir of Changxing Formation in Wenquanjing and adjacent areas of northeastern Sichuan

作　　者：焦增玉[1] 张帆[1] 曾德铭[1] 杜江民[2] 张红霞[3] 冯明友[1] 

机构地区：[1]西南石油大学资源与环境学院 [2]石家庄经济学院资源学院 [3]中国石油辽河油田分公司钻采工艺研究院

出　　处：《岩性油气藏》2011年第6期79-83,88,共6页Lithologic Reservoirs

基　　金：教育部"新世纪优秀人才支持计划"(编号:NECT-04-0911)资助

摘　　要：通过岩心观察、薄片分析及录井资料分析等,对川东北温泉井及邻区黄龙场、五百梯长兴组生物礁储层特征及控制因素进行了较为详细的研究。结果表明:该区长兴组生物礁储层储集岩主要为细—中晶白云岩、泥—粉晶白云岩、中—粗晶白云岩和礁灰(云)岩,其中细—中晶白云岩是最好的储集岩类;储层物性较差,孔隙度一般小于2%,渗透率一般小于1.0mD;储集空间以次生晶间孔、晶间溶孔及粒间溶孔等为主,小溶洞次之,局部发育裂缝,孔隙结构具有低孔、微喉的特点;储层类型以孔隙型为主,局部为裂缝-孔隙型;储层主体属于Ⅲ类储层,局部发育Ⅰ,Ⅱ类储层;储层形成与演化受沉积作用、成岩作用及构造作用的共同影响,其中沉积作用是储层形成的基础,成岩作用是改善储层的关键,构造作用为储层改善提供了有利条件。Based on core observation, thin section analysis, well logging data, the characteristics and controlling factors of reef reservoir of Changxing Formation in Wenquanjing and adjacent Huanglongchang and Wubaiti area of northeastern Sichuan were studied in detail. The result shows that the main reservoir rocks are fine-medium crystalline dolomite, clay-powder crystalline dolomite, medium-coarse crystalline dolomite and reef limestone（dolomite）, among which the fine-medium crystalline dolomite is the best. The physical property is poor, generally with porosity less than 2% and permeability less than 1.0 mD. The main reservoir spaces mainly are secondary intercrystal pores and intercrystal dissolved pores and intergranular dissolved pore, followed by small caves, and fractures developed locally. The pore structure has the characteristics of low porosity and small throat. The main reservoir type is porosity type, and fracture-porosity type is developed locally. The reservoir in the study area is mainly of type Ⅲ, and typeⅠand Ⅱ are rare. The reservoir formation and evolution are mainly affected by sedimentation, diagenesis and tectonism. Sedimentation is the foundation of reservoir formation, diagenesis is the key factor to improve the reservoir, and tectonism provides conditions for reservoir improvement.

关 键 词：长兴组 生物礁 储层特征 控制因素 川东北地区 

分 类 号：TE122.23[石油与天然气工程—油气勘探]