华北东部地区上古生界生烃潜力分析  

Hydrocarbon generation potential of Upper Paleozoic in eastern part of North China

作　　者：胡宗全[1] 周新科[1] 朱建辉[2] 

机构地区：[1]中国石化石油勘探开发研究院 [2]中国石化石油勘探开发研究院无锡实验地质研究所

出　　处：《石油勘探与开发》2006年第6期697-701,共5页Petroleum Exploration and Development

基　　金：中国石油化工股份有限公司科技开发部项目"中国石化环渤海湾地区前第三系油气资源前景"(P03076)

摘　　要：华北东部地区上古生界烃源岩“二次生烃”潜力主要取决于烃源岩的埋藏史、热史和生烃史。该区上古生界烃源岩主要有4种埋藏史类型:早期浅埋-中期抬升-晚期深埋型、早期浅埋-中期浅埋-晚期深埋型、早期中埋-中期深埋-晚期浅埋型和早期深埋-中晚期抬升型。生烃史模拟结果表明,东濮凹陷“二次生烃”集中于古近纪,晚期生烃潜力大;济阳坳陷“二次生烃”以古近纪为主,晚期生烃潜力较大;临清坳陷“二次生烃”主要在侏罗纪—白垩纪,晚期生烃潜力小。上古生界砂岩储集层物性主要受控于沉积相和埋藏深度,石英含量高、粒度粗的储集层物性条件好,有效储集层深度下限大。“二次生烃”深度上限与有效储集层深度下限共同控藏模式表明,东濮凹陷和济阳坳陷上古生界天然气成藏条件好,周口坳陷和临清坳陷较差。In the eastern part of North China, the ＂ secondary hydrocarbon generation＂ potential of the Upper Paleozoic source rock is mainly determined by burial, thermal and hydrocarbon generation histories. The Upper Paleozoic source rock has 4 types of burial history： shallow burial in early stage - uplift in middle stage - deep burial in late stage, shallow burial in early stage - shallow burial in middle stage - deep burial in late stage, middle burial in early stage - deep burial in middle stage - shallow burial in late stage, and deep burial in early stage - uplift in middle and late stages. The modeling of hydrocarbon generation indicates that the secondary hydrocarbon generation of the Paleozoic source rock in Dongpu Sag concentrates in the Paleogene period and the genetic potential is high in late stage; in Jiyang Depression, it occurs mainly since the Paleogene period and the genetic potential is high in late stage; in Linqing Depression, it occurs in the Jurassic and Cretaceous periods, the genetic potential is low in late stage. The Upper Paleozoic sandstone reservoir is controlled by sedimentary facies and burial depth, the sandstone reservoir with a high quartz content and coarse granularity has high porosity and permeability, and the maximum depth limit of effective reservoir is deeper. The minimum depth limit of ＂secondary hydrocarbon generation＂ and the maximum depth limit of effective reservoir are combined to construct a model to evaluate the gas-pool forming condition of the Upper Paleozoic, showing that the gas-pool forming conditions of Jiyang Depression and Dongpu Sag are much better than that of Zhoukou Depression and Linqing Depression.

关 键 词：华北东部 上古生界 生烃潜力 “二次生烃”深度上限 有效储集层深度下限 

分 类 号：TE33[石油与天然气工程—油气田开发工程]