摘要
桥口地区沙三组3-4亚段储层为低孔低渗致密层,次生孔隙类型为粒间溶孔、伸长状孔隙、充填后剩余的粒间孔隙、粒内溶孔、晶内溶蚀孔隙;其中溶蚀粒间孔隙和溶蚀粒内孔隙是最主要的次生孔隙类型;次生孔隙的孔径一般为2~25μm。纵向上,沙三组3-4亚段发育3个次生孔隙发育带;平面上,次生孔隙在中央隆起带的翼部、靠近东部物源区的水下扇的扇中-扇根和轴向重力流水道较为发育;次生孔隙发育的形成机理是干酪根脱羧及粘土矿物脱水形成的酸性孔隙水溶解长石等铝硅酸盐矿物和异常高压保存下来的次生孔隙经热循环对流局部改造形成。
The Es3^3-4 reservoir is the low porosity and low permeability tight reservoir in Qiaokou Area. The types of secondary pore include intergranular dissolved, extended shape, intergranuler, intragranular dissolved and intercrystal dissolution pores. The pore size of the secondary pores is 2-25μm. The intergranular dissolved pores and intragranular dissolved pores are the most important types in all the secondary pores. The Es3^3-4 reservoir has three secondary pore zone in vertical. In the plane, the secondary pores develop in the alar part of center mole track, the root fan-middle fan of sub-marine fan near the east provenance and the axial gravity flow channel. The secondary pore are generated as a result of aluminosilicate dissolution caused by acid water from decarboxylation of kerogen and dehydration of clay minerals and the part rebuild of heat recycle control-flow through overpressure.
出处
《地质找矿论丛》
CAS
CSCD
2007年第4期299-302,共4页
Contributions to Geology and Mineral Resources Research
关键词
桥口地区
热循环对流
次生孔隙
测井
Qiaokou
secondary pore
heat recycle control-flow
well logging
