四川盆地芭蕉场石炭系储层特征研究  

CHARACTERISTICS RESEARCH OF BAJIAOCHANG CARBONIFEROUS RESERVOIR IN SICHUAN BASIN

作　　者：杨天泉[1] 梅清[1] 张红梅[1] 李爱国[1] 

机构地区：[1]中油西南油气田公司勘探开发研究院

出　　处：《天然气勘探与开发》2006年第3期1-4,7,共5页Natural Gas Exploration and Development

摘　　要：芭蕉场气田是川东地区的小型气田。唯一的芭蕉1井,仅钻获石炭系气层与区域特征相似。石炭系为主要由石灰岩、白云岩与少量石膏构成的岩性组合。由于沉积和剥蚀的原因,仅残存上石炭统黄龙组。储集岩包括细粉晶云岩、泥—细粉晶云岩、细—粗粉晶云岩、针孔云岩、残余生屑灰质云岩及细—粗粉晶灰岩、泥晶、细—粗粉晶灰岩。储集空间主要为各种孔隙,辅以洞穴和裂缝;孔隙分为溶蚀孔隙及原生孔隙,溶蚀孔隙包括粒间、粒内溶孔、砾内溶孔、铸模孔、体腔孔及粒裂孔等。原生孔隙中包括粒间晶间孔、生物遮蔽孔,裂缝为主要的渗流通道;有利储层发育的成岩作用主要有白云化作用和溶蚀作用。综合评价,芭蕉场石炭系储层为为低孔、低渗、高含气饱和度储层。Bajiaochang gasfield is a small-sized one in East Sichuan. Gas in Baijiao 1 well is just from Carboniferous, only one in Baijiaochang gasfield. Carbonfierous is mainly composed of limestone, dolomite and a little gypsum. Upper Carboniferous Huanglong Formation is only remained due to sedimentation and denudation. Reservoir rocks include fine- and silt-crystalline limestone, micritic to fine- and silt-crystalline dolomite, fine to coarse- and silt-crystalline dolomite, pinhole dolomite, residual bioclast limy dolomite, fine- and coarse- and silt-crystalline limestone, micritic dolomite, fine- and coarse-crystalline limestone. Reservoir space includes mainly different pores and partly caves and fractures. Pores can be divided into solution pores and primary pores. The former includes intergranular solution pore, intragranular solution pore, intragravel solution pore, cast pore, perigastric pore and grain-fracture pore; the latter includes intergranular intercrystalline pore, bio-sheltering pore. Furthermore, fractures are main percolating channel. Diagenesis conducive to reservoir development is mainly composed of dolomitization and dissolution. It is considered that Baojiaochang Carboniferous reservoir is featured by low porosity, low permeability and high gas saturation based on the comprehensive evaluation.

关 键 词：四川盆地 芭蕉场 石炭系 储集层特征 

分 类 号：P618.13[天文地球—矿床学]