塔中北斜坡奥陶系鹰山组岩溶型储层发育模式与油气勘探

doi:10.7623/syxb201102002

石油学报 ›› 2011, Vol. 32 ›› Issue (2): 199-205.DOI: 10.7623/syxb201102002

塔中北斜坡奥陶系鹰山组岩溶型储层发育模式与油气勘探

杨海军韩剑发孙崇浩王福焕正岩吉云刚

中国石油塔里木油田公司勘探开发研究院新疆库尔勒 841000

收稿日期:2010-06-02 修回日期:2010-11-11 出版日期:2011-03-25 发布日期:2011-05-25
通讯作者: 杨海军
作者简介:杨海军，男，1970年12月生，2008年获中国地质大学（武汉）博士学位，现为中国石油塔里木油田公司勘探开发研究院高级工程师，主要从事油气综合勘探与石油地质研究。
基金资助:
国家科技重大专项（2008ZX05049）“塔里木盆地大型碳酸盐岩油气田勘探开发示范工程”和（2008ZX05004-004）“塔里木盆地海相碳酸盐岩油气资源潜力、有利勘探区带评价与目标优选研究”联合资助。

A development model and petroleum exploration of karst reservoirs of Ordovician Yingshan Formation in the northern slope of Tazhong palaeouplift

YANG Haijun HAN Jianfa SUN Chonghao WANG Fuhuan ZHENG Yan JI Yungang

Received:2010-06-02 Revised:2010-11-11 Online:2011-03-25 Published:2011-05-25

摘要/Abstract

摘要：

塔中北斜坡奥陶系鹰山组顶部的不整合面发育大规模岩溶缝洞型优质储层，目前已探明油气储量约2×10⁸t。岩溶型储层以大型缝洞储集空间为主，贯穿于不整合面以下200 m范围内，具有非均质变化的缝洞叠置连片且呈带状展布。这套储层既与岩溶古地貌相关，又受多成因、多期次成岩溶蚀、断裂裂缝、埋藏溶蚀叠加的综合控制，其中断裂和裂缝网络是岩溶水的主要渗滤通道，不整合岩溶控制了储层的横向展布规模，埋藏溶蚀是优化储集性能的关键。通过储层主控因素的深入分析，建立了储层叠合发育演化模式，综合预测了储层发育的有利区带，指出在勘探中要注重不同井区之间的储层类型和主控因素之差异性，优选主控因素以对勘探进行指导。

关键词: 塔中北斜坡, 鹰山组, 碳酸盐岩, 岩溶型储层, 断裂, 不整合岩溶, 埋藏溶蚀

Abstract:

In the northern slope of the Tazhong palaeouplift, large-scale high-quality reservoirs with karst fractures and cavities are well developed along the unconformity of the top part of the Ordovician Yingshan Formation, where the cumulatively proved oil in place is nearly 200 million tons. The reservoir space of these karst reservoirs is dominated by large fractures and vugs, penetrating through a depth of 200 m below the unconformity. These fractures and vugs are characterized by the superimposition of fractures and vugs with heterogeneous change and by a banded distribution. These reservoirs are not only related to ancient karst topography, but also controlled by many other integrated factors, such as multi-origins, multi-phase diagenetic dissolution, fracture cracks, superimposition of burial dissolution. The fracture and fracture network is a major percolation channel of karst water. And the unconformity karst controls the horizontal distribution scale of reservoirs, and burial dissolution is a key for the optimization of reservoirs. By detailed investigations on these main controlling factors, a model for the superimposed development and evolution of reservoirs was established and a comprehensive forecast for favorable zones of reservoir development was made as well. It was pointed out that it was necessary to pay attention to differences in reservoir types and main factors between different well blocks, and finally an optimal selection of main controlling factors was made for exploration guidance.

Key words: northern slope of Tazhong palaeouplift, Yingshan Formation, carbonate, karst reservoir, fault, unconformity karst, burial dissolution

杨海军韩剑发孙崇浩王福焕正岩吉云刚. 塔中北斜坡奥陶系鹰山组岩溶型储层发育模式与油气勘探[J]. 石油学报, 2011, 32(2): 199-205.

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塔中北斜坡奥陶系鹰山组岩溶型储层发育模式与油气勘探

A development model and petroleum exploration of karst reservoirs of Ordovician Yingshan Formation in the northern slope of Tazhong palaeouplift

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