塔河地区碳酸盐岩断溶体油藏特征与开发实践

doi:10.11743/ogg20150301

摘要/Abstract

摘要：

塔河地区上奥陶统覆盖区的碳酸盐岩地层经多期构造变形和岩溶作用后，沿大型溶蚀断裂带形成了各种不规则的缝洞体。利用高精度三维地震的精细相干、振幅变化率、地震时间切片等技术，结合野外露头、大量钻井资料和生产动态数据进行综合研究，首次提出了断溶体圈闭的理论概念，阐述了塔河上奥陶统覆盖区断溶体油藏的形成机理及其特征，依据其空间展布形态和控制因素将其划分为条带状、夹心饼状和平板状等。实践证实，断溶体圈闭（油藏）是塔河外围斜坡区极为特殊的一种油气藏类型，不同类型断溶体油藏开发效果差异较大，其中条带状断溶体油藏开发效果最好，该类圈闭的研究成果对塔里木盆地同类油藏的勘探开发都具有重要的借鉴意义。

关键词: 缝洞体, 断溶体, 岩溶作用, 碳酸盐岩, 塔河油田, 塔里木盆地

Abstract:

Various irregular fractured-vuggy reservoirs were formed along the large fault-karst belts in the area covered by the Upper Ordovician in Tahe area due to multi-phase tectonic deformations and karstifications of the carbonates.Using fine coherence, amplitude change rate, time slice and other properties of high-precision three-dimensional seismic, outcrops, drilling and production data, this paper first presented a theoretical concept of fault-karst trap, and elaborated its forming mechanism and geologic characteristics in this area.The fault-karst reservoirs can be divided into three types by their shapes and controlling factors:banded, sandwich and tabular reservoirs.According to recent development practices, the fault-karst reservoir is a very special reservoir type in this area.The development effectiveness of different fault-karst carbonate reservoirs is quite dissimilar, with the banded ones being the best in development performance.It is of great significance for the petroleum exploration and development of similar reservoirs in the Tarim Basin.

Key words: fractured-vuggy rock mass, fault-karst rock mass, karstification, carbonate, Tahe oilfield, Tarim Basin

中图分类号:

TE122.3

鲁新便,胡文革,汪彦,等. 塔河地区碳酸盐岩断溶体油藏特征与开发实践[J]. 石油与天然气地质, 2015, 36(3): 347-355. doi: 10.11743/ogg20150301 Lu Xinbian,Hu Wenge,Wang Yan,et al. Characteristics and development practice of fault-karst carbonate reservoirs in Tahe area,Tarim Basin[J]. Oil & Gas Geology, 2015, 36(3): 347-355. doi: 10.11743/ogg20150301

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