Karst-Controlled Diagenesis and Reservoir Development: Example from the Ordovician Main-Reservoir Carbonate Rocks on the Eastern Margin of the Ordos Basin, China

Baoqing Wang; Ihsan S. Al-Aasm

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Karst-Controlled Diagenesis and Reservoir Development: Example from the Ordovician Main-Reservoir Carbonate Rocks on the Eastern Margin of the Ordos Basin, China

机译：岩溶控制的成岩作用和储层发育-以中国鄂尔多斯盆地东缘奥陶系主储层碳酸盐岩为例

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The Ordovician Majiagou Formation contains the main reservoir of the Ordos Central gas field in the Ordos basin. The producing zone at the top of member 5 consists of carbonate rocks modified during a long period of subaerial exposure and karstification from the Late Ordovician to the middle Carboniferous. On the eastern margin of the Ordos basin, the porosity of the exposed carbonate rocks of this unit ranges from 0.5 to 15.1%, and permeability ranges from 8%, and permeability ranges from <0.1 to 5 md. The main reservoir porosity is a dissolution-enhanced vuggy porosity, associated with dolomite. The carbonate rocks show great heterogeneity, reflecting the varying effects of karstification in creating and modifying porosity.

机译：奥陶纪马家沟组包含了鄂尔多斯盆地鄂尔多斯中央气田的主要储层。在成员5顶部的生产区由碳酸盐岩组成，这些碳酸盐岩在奥陶纪晚期至奥陶纪晚期经历了长期的地下暴露和岩溶作用。中石炭纪。在鄂尔多斯盆地东缘的上，该单元裸露的碳酸盐岩的孔隙度范围为0.5％至15.1％，渗透率范围为 8％，和渗透率范围从<0.1到5 md。主要储层孔隙度是溶解度提高的孔状孔隙度，与白云岩相关。碳酸盐岩表现出很大的非均质性，反映了岩溶作用在产生和改变孔隙度方面的不同作用。

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《AAPG Bulletin》 |2002年第9期|1639-1658|共20页
作者
Baoqing Wang; Ihsan S. Al-Aasm;
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Department of Petroleum Geology, Xi'an Petroleum Institute, Xi'an, 710065, People's Republic of China bqwang@xapi.edu.cn;

Department of Earth Sciences, School of Physical Sciences, University of Windsor, Windsor, Ontario, Canada, N9B 3P4 alaasm@uwindsor.ca;

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机译：岩溶控制的成岩作用与储层发育;以鄂尔多斯盆地东缘奥陶系主储层碳酸盐岩为例
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Karst-Controlled Diagenesis and Reservoir Development: Example from the Ordovician Main-Reservoir Carbonate Rocks on the Eastern Margin of the Ordos Basin, China

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