东濮凹陷北部地区温压系统与油气分布的关系
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摘要
针对东濮凹陷北部地区地温-地压系统特征研究薄弱的问题,基于东濮凹陷北部地区地温和地压实测数据,应用地温-地压系统原理分析了东濮凹陷北部地区地温场、地压场及温-压系统特征,并结合构造格局分析了它们对油气分布的影响。研究表明,东濮凹陷北部地区地温梯度总体较高,洼陷带具有埋藏深、地温高的特点。纵向上发育常压型温压系统和高压型复式温压系统。平面上可划分为高温高压、常温高压、高温常压、常温常压和低温常压5个分区,油气主要富集于能量低的常温常压区;与渤海湾盆地其它凹陷油气富集区不同,由于东濮凹陷北部地区膏盐盖层发育,从而在能量高的常温高压区也聚集了大量油气。
In view of the weak research on the characteristics of geotemperature-pressure system in the northern part of Dongpu Depression, based on the measurements of ground temperature and pressure, the characteristics of geotemperature field,geopressure field and temperature-pressure system in the northern part of Dongpu depression are analyzed by T-P system theory.Combined with the structure distribution pattern, their effects on hydrocarbon distribution have been analyzed. The study demonstrates that the temperature gradient in north part of Dongpu depression is high, the sag zone has the characteristics of deep buried and high geotemperature, which is beneficial to the maturity of source rocks and the formation of hydrocarbon in the sag zone. The deep overpressure could be as the important motivating force for hydrocarbon migration. In vertical, the T-P system includes static pressure geothermal-geopressure system and overpressure complex geothermal-geopressure system. The lateral T-P system can be divided into 5 subareas, namely, HTHP, NTHP, HTNP, NTNP and LTNP, and the low-energy NTNP is the place where petroleum mainly accumulates. Different from other hydrocarbon rich depressions in the Bohai bay bain, due to the development of gypsum-salt cap rock, a large amount of hydrocarbon has accumulated in the high-energy NTHP.
In view of the weak research on the characteristics of geotemperature-pressure system in the northern part of Dongpu Depression, based on the measurements of ground temperature and pressure, the characteristics of geotemperature field,geopressure field and temperature-pressure system in the northern part of Dongpu depression are analyzed by T-P system theory.Combined with the structure distribution pattern, their effects on hydrocarbon distribution have been analyzed. The study demonstrates that the temperature gradient in north part of Dongpu depression is high, the sag zone has the characteristics of deep buried and high geotemperature, which is beneficial to the maturity of source rocks and the formation of hydrocarbon in the sag zone. The deep overpressure could be as the important motivating force for hydrocarbon migration. In vertical, the T-P system includes static pressure geothermal-geopressure system and overpressure complex geothermal-geopressure system. The lateral T-P system can be divided into 5 subareas, namely, HTHP, NTHP, HTNP, NTNP and LTNP, and the low-energy NTNP is the place where petroleum mainly accumulates. Different from other hydrocarbon rich depressions in the Bohai bay bain, due to the development of gypsum-salt cap rock, a large amount of hydrocarbon has accumulated in the high-energy NTHP.
引文
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[2] Barker C.Aquathermal pressuringrole of temperature in development of abnormal pressure zones[J].Aapg Bulletin,1972,56(10):181184.
[3]叶加仁,杨香华.沉积盆地热流体活动及其成藏动力学意义[J].沉积学报,2001,19(2):214218.Ye J R,Yang X H. Thermal fluid flow in sedimentary basins and its significance to poolforming dynamics[J]. Acta Sedimentologica Sinica,2001,19(2):214218.
[4]冯昌格,刘绍文,王良书,等.塔里木盆地中央隆起区现今地温场分布特征及其与油气的关系[J].地球科学(中国地质大学学报),2010,35(4):645656.Feng C G,Liu S W,Wang L S,et al.Presentday geotemperature field characteristics in the central uplift area of the Tarim basin and implications for hydrocarbon generaion and preservation[J]. Earth Science(Journal of China University of Geosciences),2010,35(4):645656.
[5]张功成,李友川,刘世翔,等.“源热共控”中国海油气田“近岸油、远岸气”有序分布[J].中国石油勘探,2014,19(5):122.Zhang G C,Li Y C,Liu S X,et al.“Cocontrol of source rock and heat”in orderly distribution of“nearshore oil and farshore gas”in China’s offshore and adjacent area[J].China Petroleum Exploration,2014,19(5):122.
[6]张功成.源热共控论[J].石油学报,2012,33(5):723738.Zhang G C.Cocontrol of source and heat:The generation and distribution of hydrocarbons controlled by source rocks and heat[J].Acta Petrolei Sinica,2012,33(5):723738.
[7] Chen Z,Osadetz K G,Issler D R,et al.Hydrocarbon migration detected by regional temperature field variations,beaufort Mackenzie basin,Canada[J].Aapg Bulletin,2008,92(12):16391653.
[8]蒋有录,王鑫,于倩倩,等.渤海湾盆地含油气凹陷压力场特征及与油气富集关系[J].石油学报,2016,37(11):13611369.Jiang Y L,Wang X,Yu Q Q,et al,Pressure field characteristics of petroliferous depressions and its relationship with hydrocarbon enrichment in Bohai bay basin[J].Acta Petrolei Sinica,2016,37(11):13611369.
[9]周东红,李建平,郭永华.辽西低凸起及辽中凹陷压力场特征与油气分布关系[J].断块油气田,2012,19(1):6569.Zhou D H,Li J P,Guo Y H.Characteristics of pressure field and its relationship with hydrocarbon distribution in Liaoxi low uplift and Liaozhong sag[J].FaultBlock Oil and Gas Field,2012,19(1):6569.
[10]谭绍泉,曾治平,宫亚军,等.准噶尔盆地腹部超压控制烃、储演化与油气充注过程[J].断块油气田,2014,21(3):287291.Tan S Q,Zeng Z P,Gong Y J,et al.Control of abnormal overpressure on hydrocarbonreservoir evolution and hydrocarbon filling process in central of Junggar basin[J].FaultBlock Oil and Gas Field,2014,21(3):287291.
[11]刘金水.西湖凹陷平湖构造带地层压力特征及与油气分布的关系[J].成都理工大学学报(自然科学版),2015,42(1):6069.Liu J S.Characteristics of formation pressure and their relationship with hydrocarbon distribution in Pinghu tectonic belt of Xihu sag,East China Sea[J].Journal of Chengdu University of Technology(Science&Technology Edition),2015,24(1):6069.
[12] Hunt J M.Generation and migration of petroleum from abnormally pressured fluid compartments[J].Aapg Bulletin,1990,74(1):112.
[13] Anissimov L.Overpressure phenomena in the Precaspian basin[J].Petroleum Geoscience,2001,7(4):389394.
[14]郝芳,董伟良.沉积盆地超压系统演化、流体流动与成藏机理[J].地球科学进展,2001,16(1):7985.Hao F,Dong W L.Evolution of fluid flow and petroleum accumulation in overpressured systems in sedimentary basins[J].Advance in Earth Sciences,2001,16(1):7985.
[15]于波,周康,郭强,等.鄂尔多斯盆地吴定地区延长组下部油气成藏模式与主控因素[J].地质与勘探,2012,48(4):858864.Yu B,Zhou K,Guo Q,et al.Hydrocarbon accumulation models and the main controlling fractors for the lower member of the upper triassic Yanchang formation in the WuqiDingbian area of the Ordos basin[J].Geology and Exploration,2012,48(4):858864.
[16]刘震,张万选,曾宪斌,等.含油气盆地地温地压系统浅析[J].天然气地球科学,1996(1):3438.Liu Z,Zhang W X,Zeng X B,et al. Analysis of geothermalgeopressure system in petroliferous basins[J]. Natural Gas Geoscience,1996(1):3438.
[17]刘震,朱文奇,孙强,等.中国含油气盆地地温地压系统[J].石油学报,2012,33(1):117.Liu Z,Zhu W Q,Sun Q,et al.Characteristics of geotemperature geopressure systems in petroliferous basins of China[J].Acta Petrolei Sinica,2012,33(1):117.
[18]付鑫,叶加仁,朱红涛,等.潜江凹陷潜江组地温地压系统特征及其与油气成藏关系[J].地球科学(中国地质大学学报),2012,37(4):860868.Fu X,Ye J R,Zhu H T,et al. Characteristics of geotemperaturegeopressure system of the Qianjiang formation in the Qianjiang depression and their relationship with petroleum accumulation[J]. Earth Science(Journal of China University of Geosciences),2012,37(4):860868.
[19]刘丽,任战利,崔营滨,等.东濮凹陷现今地温场分布特征[J].地质科学,2007,42(4):787794.Liu L,Ren Z L,Cui Y B,et al. Distribution of presentday geothermal field in the Dongpu sag[J]. Chinese Journal of Geology,2007,42(4):787794.
[20]左银辉,唐世林,张旺,等.东濮凹陷新生代构造热历史研究[J].地学前缘,2017,24(3):149156.Zuo Y H,Tang S L,Zhang W,et al.Cenozoic thermal history of the Dongpu sag[J].Earth Science Frontiers,2017,24(3):149156.
[21]孙波,蒋有录,石小虎,等.渤海湾盆地东濮凹陷压力演化与超压形成机制[J].中国石油大学学报(自然科学版),2013,37(2):2835.Sun B,Jiang Y L,Shi X H,et al. Pressure evolution and formation mechanism of overpressure in Dongpu depression,Bohaiwan basin[J].Journal of China University of Petroleum(Edition of Natural Science),2013,37(2):2835.
[22]刘景东,蒋有录.东濮凹陷中央隆起带北部古近系异常高压与油气成藏的关系[J].天然气工业,2012,32(12):3036.Liu J D,Jiang Y L.Relationship between abnormally high pressure and hydrocarbon accumulation of the paleogene reservoirs in the northern part of central uplift,Dongpu sag,Bohai bay basin[J].Natural Gas Industry,2012,32(12):3036.
[23]纪友亮,冯建辉,王声朗,等.东濮凹陷下第三系沙三段盐岩和膏盐岩的成因[J].沉积学报,2005,23(2):225231.Ji Y L,Feng J H,Wang S L,et al.Origin of salt and gypsum rock in the third member of Shahejie formation of lower tertiary in Dongpu depression[J].Acta Sedimentologica Sinica,2005,23(2):225231.
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