渝东地区石炭系储层特征及分布规律研究  

CARBONIFEROUS RESERVOIR CHARACTERISTICS AND ITS DISTRIBUTION IN EASTERN CHONGQING

作　　者：赵正望[1] 陈洪斌[1] 黄平[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》2007年第4期6-9,共4页Natural Gas Exploration and Development

摘　　要：在对岩性、物性、微观孔隙结构、主控因素等研究的基础上,依据测井储层处理并结合地震储层预测研究储层分布规律认为:渝东地区石炭系储层除厚度变化大外,其特征与川东有很大的相似性,储集岩为颗粒云岩、晶粒云岩、角砾云岩,储层物性以黄龙组二段最好,为低孔低渗储层。储集空间为孔隙、裂逢和洞穴,主要孔隙类型为粒间溶孔、粒内溶孔、砾间溶孔、砾内溶孔,裂缝发育。储集类型为裂缝—孔隙型,以Ⅱ、Ⅲ类储层为主。储层主要受到沉积微相、成岩作用及后期构造活动影响和控制;主要分布在黄龙组二段,厚度变化大即0m^30m,总体上呈西厚东薄。池34井区—寨沟4井区—云安3井区一带是有利储层的主要分布区。The reservoirs in eastern Chongqing are deeply studied based on lithologic characteristics, reservoir property, micropore structure and main control factors. According to logging -reservoir processing and seismic -reservoir prediction, the reservoir distribution has been studied. It is considered that the Carboniferous reservoir characteristics in eastern Chongqing are similar to those in East Sichuan. Reservoir properties with low porosity and low permeability in the 2nd Member of Huanglong Formation are best. Reservoir rocks include grain limestone, crystal limestone and breccia limestone. Reservoir spaces are pores, fractures and caves. Main pore types are classified into intragranular solution pore and intragranular solution pore. Fractures are very developed in reservoir rocks. The reservoir type is fractured-porous type, with type II and III as the soul. Simultaneously reservoirs are affected and controlled by sedimentary microfacies, diagensis and epigenetic tectonism. Vertically, reservoirs are distributed in the 2nd Member of Huanglong Formation. The reservoir thickness varies from 0 m to 30 m , generally thicker in the west and thinner in the east. With NE-SW-ward favorable reservoirs mainly distribute at Chi 34-Zhaigou 4 and Yunan 3 wellblocks .

关 键 词：分布规律 储层特征 石炭系 渝东地区 

分 类 号：P618.13[天文地球—矿床学]