储聚期孔隙类型及其预测中的有关问题

POROSITY TYPES IN RESERVOIR-ACCUMULATION STAGE AND SOME PROBLEMS ON ESTIMATION

胡惟元 刘树晖

Hu Weiyuan Liu Shuhui

在储层研究中,最关键的环节是采用聚集期孔隙评价储集层。只有抓住这一环节,方能作出符合实际的评价和预测。 本文将聚集期孔隙分为五类:(1)埋藏期原生孔隙;(2)埋藏期次生孔隙;(3)早成岩期近地表次生孔隙,(4)晚成岩期近地表次生孔隙;(5)白云石化孔隙。 预测聚集期孔隙,必须恢复孔隙演化史和根据有机质成熟度决定其脱羧阶段及油气储聚时期,探索二者演化间的关系,寻求烃类储层的空间分布和经济潜能。

The most key link is to evaluate reservoir by porosity of reservoir-accumulation stage in the reservoir research. As long as we grasp this key link,we can make appropriate evaluation and estimation. Porosity types of reservoir-accumulation stage may be divided into fivetypes: 1. Primary porosity of burial stage; 2. Secondary porosity of burialstage: 3. Nearsurface secondary porosity of early diagenesis; 4. Nearsurface secondary porosity of late diagenesis; 5. Dolomitization porosity. To estimate the porosity of reservoir-accumulation stage, we must recoverthe history of porosity evolution through the medium of diagenesis re-search, and determine the stages of decarboxylation and reservoir-accumulation based on maturity of organic matter. Through the agency of the relations be-tween the evolution of porosity and organic matter, we may be able to find the space distribution of hydrocarbon reservoirs and the commercial potential.

10.11743/ogg19880316