普光气田鲕滩云岩储层物性及天然气储量计算的量化

马永生

doi:10.11764/j.issn.1672-1926.2008.04.437

天然气地球科学 >

2008 , Vol. 19 >Issue 4: 437 - 443

DOI: https://doi.org/10.11764/j.issn.1672-1926.2008.04.437

天然气地质学

普光气田鲕滩云岩储层物性及天然气储量计算的量化

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中国石油化工份有限公司勘探分公司，北京 100029

〖HTSS〗〖WTHZ〗E\|mail〖WTBZ〗：yongshma@126.com.

收稿日期: 2008-04-25

修回日期: 2008-08-05

网络出版日期: 2008-04-20

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Quantitative Calculation of Reservoir Properties and Gas Saturation in Oolitic Dolostone, Puguang Gasfield

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Exploration Division, China Petroleum and Chemical Corp., Beijing 100029, China

Received date: 2008-04-25

Revised date: 2008-08-05

Online published: 2008-04-20

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摘要

普光大型气田的发现为我国深层海相碳酸盐岩的勘探提供了重要参考.普光气田发现了目前国内最好的深部白云岩储层,储层不仅厚度大,分布范围广,而且次生孔隙也异常发育.研究认为,普光气藏的油气充注时间早、埋藏深、有机质热演化程度高,烃(油气)-岩(碳酸盐岩储层)-水相互作用的时间长.该地区次生孔隙的发育受多期次成岩作用的影响,成因机理复杂.通过对普光气田长兴组-飞仙关组沉积环境、沉积相带和储层孔隙特征的研究,认为普光优质白云岩储层的形成是发育在有利沉积相带的基础上,受表生溶蚀、埋藏溶蚀、超压作用和构造运动等多种因素共同作用的结果,其中TSR对储层的埋藏溶蚀作用和有机质热演化形成的超压作用对长兴组-飞仙关组次生孔隙发育的具有重要的影响. 更多还原

关键词： 深部优质储层; 白云岩; 溶蚀作用; 普光气田; 四川盆地

本文引用格式

马永生 . 普光气田鲕滩云岩储层物性及天然气储量计算的量化[J]. 天然气地球科学, 2008 , 19(4) : 437 -443 . DOI: 10.11764/j.issn.1672-1926.2008.04.437

Abstract

Oolitic dolostone is a vital type of carbonate reservoirs. The quantitative calculation and prediction of the reservoir permeability and gas saturation provide an important foundation for the further development of the reservoir, which could determine productivity and select the optimum exploitation layers in the dolostone. The general permeability model links geology and reservoir properties via rock number λ, which varies regularly within a depositional cycle. By using λ, the permeabilities and their changing trend can be indicated within a high-resolution depositional framework. The cementation index m, an important parameter in calculating gas saturation by Archie formula, varies with the pore type in the dolostone. The permeability profile resulted from the permeability model by using the primary water saturation, porosity from thin sections, cores, debris, and well logging data; and the gas-saturation profile from the Archie formula combining with the values of m and formation-water resistivities in the oolitic reservoir, both of them act as the basis for optimizing development program of the gas reservoir in the dolostone after it was discovered.

Key words： Oolitic dolostone; General permeability model; Reservoir permeability; Gementation; Gas saturation

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