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ZHANG NiNi, LIU LuoFu, SU TianXi, DAI QiWen, ZHAO YuanYuan. Reservoir Characteristics and Main Controlling Factors of the Lower Jurassic Tight Sandstone in Eastern Kuqa Depression[J]. Acta Sedimentologica Sinica, 2015, 33(1): 160-169. doi: 10.14027/j.cnki.cjxb.2015.01.017
Citation: ZHANG NiNi, LIU LuoFu, SU TianXi, DAI QiWen, ZHAO YuanYuan. Reservoir Characteristics and Main Controlling Factors of the Lower Jurassic Tight Sandstone in Eastern Kuqa Depression[J]. Acta Sedimentologica Sinica, 2015, 33(1): 160-169. doi: 10.14027/j.cnki.cjxb.2015.01.017

Reservoir Characteristics and Main Controlling Factors of the Lower Jurassic Tight Sandstone in Eastern Kuqa Depression

doi: 10.14027/j.cnki.cjxb.2015.01.017
  • Received Date: 2013-11-18
  • Rev Recd Date: 2014-05-12
  • Publish Date: 2015-02-10
  • The tight sandstone gas of Tarim Basin has a large distribution and great exploration potential, which is an important prospective exploration field of the basin in the future. The Lower Jurassic sandstone in eastern Kuqa depression is commonly tight. It is important for the further exploration and development to strengthen the study of its reservoir characteristics and the main controlling factors. In order to reveal the controlling factors and development mechanism of the Lower Jurassic tight sandstone reservoir in eastern Kuqa depression, by use of the tests of casting section, cathodeluminescence, scanning electron microscope and laser confocal microscopy are applied, together with the geological and logging analyses. The lithology, pore structure characteristics and physical properties are carried out in this paper. The results show that lithic sandstone is the main reservoir rock type, and the rock composition maturity is low while the textural maturity is of medium degree. The pore structure is mainly mesoporous with fine throat and micropore with fine throat. Majority of the porosity values ranges from 4% to 12%, with an average of 8.12%, and the effective air permeability is mainly (0.1~3)×10-3μm2; On the basis of the comprehensive analyses of sedimentation, diagenesis and tectonics of tight reservoir strata, the studies suggest that the reservoir physical property is mainly controlled by sedimentation, diagenesis and tectonism. The main controlling factors are granularity and compaction.
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  • Received:  2013-11-18
  • Revised:  2014-05-12
  • Published:  2015-02-10

Reservoir Characteristics and Main Controlling Factors of the Lower Jurassic Tight Sandstone in Eastern Kuqa Depression

doi: 10.14027/j.cnki.cjxb.2015.01.017

Abstract: The tight sandstone gas of Tarim Basin has a large distribution and great exploration potential, which is an important prospective exploration field of the basin in the future. The Lower Jurassic sandstone in eastern Kuqa depression is commonly tight. It is important for the further exploration and development to strengthen the study of its reservoir characteristics and the main controlling factors. In order to reveal the controlling factors and development mechanism of the Lower Jurassic tight sandstone reservoir in eastern Kuqa depression, by use of the tests of casting section, cathodeluminescence, scanning electron microscope and laser confocal microscopy are applied, together with the geological and logging analyses. The lithology, pore structure characteristics and physical properties are carried out in this paper. The results show that lithic sandstone is the main reservoir rock type, and the rock composition maturity is low while the textural maturity is of medium degree. The pore structure is mainly mesoporous with fine throat and micropore with fine throat. Majority of the porosity values ranges from 4% to 12%, with an average of 8.12%, and the effective air permeability is mainly (0.1~3)×10-3μm2; On the basis of the comprehensive analyses of sedimentation, diagenesis and tectonics of tight reservoir strata, the studies suggest that the reservoir physical property is mainly controlled by sedimentation, diagenesis and tectonism. The main controlling factors are granularity and compaction.

ZHANG NiNi, LIU LuoFu, SU TianXi, DAI QiWen, ZHAO YuanYuan. Reservoir Characteristics and Main Controlling Factors of the Lower Jurassic Tight Sandstone in Eastern Kuqa Depression[J]. Acta Sedimentologica Sinica, 2015, 33(1): 160-169. doi: 10.14027/j.cnki.cjxb.2015.01.017
Citation: ZHANG NiNi, LIU LuoFu, SU TianXi, DAI QiWen, ZHAO YuanYuan. Reservoir Characteristics and Main Controlling Factors of the Lower Jurassic Tight Sandstone in Eastern Kuqa Depression[J]. Acta Sedimentologica Sinica, 2015, 33(1): 160-169. doi: 10.14027/j.cnki.cjxb.2015.01.017
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