Macro heterogeneity of reservoirs in Sulige gasfield—a case study of the 8<sup>th</sup> member of the Shihezi Formation and the 1<sup>st</sup> member of the Shanxi Formation in the Su53 Block

doi:10.11743/ogg20110211

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Macro heterogeneity of reservoirs in Sulige gasfield—a case study of the 8^th member of the Shihezi Formation and the 1^st member of the Shanxi Formation in the Su53 Block
Vol. 32, Issue 2, Pages: 236-244(2011)
Online First：28 April 2011，

Published：2011
DOI： 10.11743/ogg20110211
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DOI：

Macro heterogeneity of reservoirs in Sulige gasfield—a case study of the 8^th member of the Shihezi Formation and the 1^st member of the Shanxi Formation in the Su53 Block[J]. 2011, 32(2): 236-244. DOI: 10.11743/ogg20110211. DOI：

摘要

苏里格气田位于鄂尔多斯市苏里格庙地区，属于典型的岩性圈闭气藏，具有“低孔、低渗、低丰度”的地质特征。以苏53区块为研究目标，从宏观上明确其总体低渗背景下的相对高渗储集砂体的分布规律，优选出天然气相对富集区。结合区域基本地质特征，在地层系统划分的前提下，充分利用测井和试气等实际地质资料，对储层非均质性参数进行分析。同时借助三维地质建模的研究结果，结合微观分析数据，分别对苏里格气田苏53区块石盒子组8段和山西组1段储层层内非均质性、平面非均质性和层间非均质性进行研究。结果显示，研究区石盒子组8段和山西组1段层内和层间非均质性都十分严重，但纵向上的层间和层内非均质性要强于平面非均质性；石盒子组8上段砂体最发育，在沿河道方向砂体连续性较好，而在垂直河道方向上河道砂体更叠频繁，连续性较差，致使层间非均质性最严重。

Abstract

Sulige gas field

located at Sulige temple district in Ordos City

is a typical lithologic gas reservoir characterized by low porosity

low permeability and low abundance. In this paper

the distribution of sandbodies with relatively high permeability in the low permeability background is predicted and the relative gas enrichment zones are recognized in Su53 block. The reservoir heterogeneity is analyzed by using the logging and test data and combining with regional geological features. Meanwhile

3D geological modeling results and microscopic analysis data are integrated to predict the inlayer

horizontal and interlayer heterogeneities in the eighth member of Shihezi Formation and the first member of Shanxi Formation in Su53 Block

Sulige gas field. The results suggest that both their inlayer and interlayer heterogeneities are strong

and are stronger vertically than horizontally. Sandbodies are highly developed in the upper part of the eighth member of Shihezi Formation. Their continuity is good along the channel but poor perpendicular to the channel

resulting in the strongest interlayer heterogeneity.