柴西地区地温-地压系统特征及其与油气分布的关系

doi:10.11743/ogg20060107

Abstract

Abstract:

Geothermal gradients range between 2.0℃ and 4.5℃ per hundred meters in western Qaidam basin, with an average value of 3.0℃ per hundred meters. Abnormally high pressure can occur at a depth of 2 300 m and over, and the pressure coefficient can be as high as 2.0. Laterally, the temperature-pressure systems in western Qaidam basin can be divided into 9 subareas such as HPHT, according to the formation pressure coefficients and the distribution intervals of the abnormal geotemperatures. Vertically, they can be divided into the upper static pressure type and the lower overpressure type. The upper and lower temperature-pressure systems have quite different fluid energies, thus hydrocarbons are highly capable of migrating vertically and are prone to accumulate around the boundaries of temperature-pressure systems. Laterally, oil and gas pools are basically distributed in the subareas with relatively low fluid energy; there are also oil and gas pools occurring in the sub-areas with high fluid energy, but most of them are primary oil and gas reservoirs with good sealing and preservation conditions, such as lithologic and structural-lithologic reservoirs. Characteristics of present temperature-pressure systems show that the deep temperature-pressure systems of high pressure type have good sealing conditions and contain most of the oil and gas reserves, thus they would be the main targets of future petroleum exploration.

Key words: formation temperature, formation pressure, geotemperature-geopressure system, hydrocarbon migration and accumulation, Qaidam basin

CLC Number:

TE112.2

Li Heyong, Liu Zhen, Dang Yuqi, Li Weilian, Liang Quansheng, Zhang Yongshu. Characteristics of geotemperature-geopressure system in western Qaidam basin and their relationship with oil and gas distribution[J]. Oil & Gas Geology, 2006, 27(1): 37-43.

References

[1] Lewis C R,Rose S C.A theory relating high temperature and overpressures[J].JPT,1970,22 (1):11-16
[2] Hunt J M.Generation and migration of petroleum from abnormally pressured fluid compartment[J].AAPG Bull,1990,74(1):1-12
[3] 邱楠生,方家虎.热作为油运移动力的物理模拟实验[J].石油与天然气地质,2003,24(3):210～214Qiu Nansheng,Fang Jiahu.Physical simulation for petroleum migration in thermodynamic system[J].Oil & Gas Geology,2003,24(3):210-2143
[4] Magoon L B.The petroleum system; a classification scheme for research,exploration,and resource assessment [A].In:Magoon L B,ed.Petroleum systems of the United States[C].U.S.Geological Survey Bull (1870).1988.2-15
[5] 沈显杰,李国桦,汪缉安,等.青海省柴达木盆地大地热流测量与统计热流计算[J].地球物理学报,1994,37(1):56～65Shen Xianjie,Li Guohua,Wang Ji'an,et al.Terrestrial heat flow measurement and calculation of statistical heat flow in Qaidam basin [J].Chinese Journal of Geophysics,1994,37 (1):56-65
[6] 邱楠生,康永尚,樊洪海,等.柴达木盆地西部地区第三系温度压力和油气分布相互关系探讨[J].地球物理学报,1999,42(6):826～833Qiu Nansheng,Kang Yongshang,Fan Honghai,et al.Temperature,pressure and reserveoir distribution in Tertiary,western Qaidam basin[J].Acta Geophysica Sinica,1999,42 (6):826-833
[7] 刘震,曾宪斌,张万选.沉积盆地地温与地层压力关系分析[J].地质学报,1997,71(2):180～185Liu Zhen,Zeng Xianbin,Zhang Wanxuan.Relation between subsurface temperatures and formation pressures in sedimentary basins[J].Acta Geologica Sinica,1997,71 (2):180-185
[8] 刘震,贺维英,韩军,等.准噶尔盆地东部地温地压系统与油气运聚成藏的关系[J].石油大学学报,2000,24(4):15～20Liu Zhen,He Weiying,Han Jun,et al.Relation of geotemperaturepressure systems with migration and accumulation of petroleum in the east of Junggar basin[J].Journal of the University of Petroleum,China,2000,24(4):15-20
[9] 肖焕钦,刘震,赵阳,等.济阳坳陷地温-地压场特征及其石油地质意义[J].石油勘探与开发,2003,30(3):68～70Xiao Huanqin,Liu Zhen,Zhao Yang,et al.Characteristics of geotemperature and geopressure fields in the Jiyang depression and their significance of petroleum geology[J].Petroleum Exploration & Development,2003,30(3):68-70
[10] 叶加仁,王连进,邵荣.油气成藏动力学中的流体动力场[J].石油与天然气地质,1999,20(2):183～185Ye Jiaren,Wang Lianjin,Shao Rong.Fluid dynamic fields in pool-forming dynamics of oil and gas [J].Oil & Gas Geology,1999,20(2):183-185
[11] 孙冬胜,金之钧,吕修祥,等.沉积盆地超压体系划分及其与油气运聚关系[J].石油与天然气地质,2004,25(1):4～38Sun Dongsheng,Jin Zhijun,Lii Xiuxiang,et al.Classification of overpressure systems in sedimentary basins and their relationship with hydrocarbon migration and accumulation [J].Oil & Gas Geology,2004,25 (1):4-38
[12] 赵桂萍.准噶尔盆地南缘异常高压及其与油气成藏的关系[J].石油与天然气地质,2003,24(4):327～331Zhao Guiping.Overpressure and its relation to petroleum accumulation in southern edge of Junggar basin [J].Oil & Gas Geology,2003,24(4):327-331
[13] 徐凤银,彭德华,侯恩科.柴达木盆地油气聚集规律及勘探前景[J].石油学报,2003,24(4):1～6Xu Fengyin,Peng Dehua,Hou Enke.Hydrocarbon accumulation and exploration potential in Qaidam basin [J].Acta Petrolei Sinica,2003,24(4):1-6

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Characteristics of geotemperature-geopressure system in western Qaidam basin and their relationship with oil and gas distribution

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