Controlling factors on high quality reservoir of tight sandstone of Denglouku Formation in Changling Fault Sag,southern part of Songliao Basin
Controlling factors on high quality reservoir of tight sandstone of Denglouku Formation in Changling Fault Sag,southern part of Songliao Basin
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发表时间：
2012
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通讯作者：
W. Ying
中科院分区：
文献类型：
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作者：
W. Ying
The characteristics of tight sandstone reservoirs of the Denglouku Formation in the Changling Fault Sag were investigated,based on measurements normal thin-sections,cast thin-sections and cathodoluminescence thin-sections,scanning electron microscope,and X-ray diffraction of clay minerals.The reason of tight sandstone reservoirs and the controlling factors of high quality reservoir dealt with tentonic characteristics,combining sedimentary characteristics and diagenesis were analyzed.The results show that the reservoir of Denglouku Formation is a set of braided river and braided river deltaic sediments,which is comprised of feldspathic litharenitc and lithic arkose.The reservoirs in fault subsidence have all become densified.Sedimentation is the most fundamental element to form tight sandstone.The type and intensity of diagenesis are decided by lithologic character of parent rock.The compaction and cementation are the key points to form tight sandstone.The formation of high quality reservoir is controlled by a lot of elements.Sedimentary facies,particle diameter of sandstone and deep fluid dissolution are the main elements to control the distribution of high quality reservoir.
