库车前陆盆地古近系岩盐对烃源岩生气高峰期的迟缓作用及其意义

卓勤功, 赵孟军, 李勇, 鲁雪松, 方世虎

doi:10.11764/j.issn.1672-1926.2014.12.1903

天然气地球科学 >

2014 , Vol. 25 >Issue 12: 1903 - 1912

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.12.1903

天然气地质学

库车前陆盆地古近系岩盐对烃源岩生气高峰期的迟缓作用及其意义

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1.中国石油勘探开发研究院，北京 100083； 2.中国石油塔里木油田分公司，勘探开发研究院，新疆库尔勒 841000

卓勤功(1969-)，男，安徽萧县人，高级工程师，博士，主要从事油气成藏研究.E-mail:zhuoqg@petrochina.com.cn.

收稿日期: 2014-01-27

修回日期: 2014-05-14

网络出版日期: 2019-09-18

基金资助

国家油气重大专项 (编号:2011ZX05003)|中石油股份公司项目(编号:2011B-04)|中国石油勘探开发研究院项目(编号:2011Y-003)联合资助.

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The Delay of Paleogene Evaporate on the Gas Generation Peak of Source Rocks and Its Significance in Kuqa Foreland Basin

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1.Research Institute of Petroleum Exploration and Development,CNPC,Beijing 100083,China； 2.Tarim Oilfield Company,Research Institute of Petroleum Exploration and Development,Korla 841000,China

Received date: 2014-01-27

Revised date: 2014-05-14

Online published: 2019-09-18

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摘要

岩盐热导率是砂泥岩的2~3倍，高热导率使盐下地层热量快速向上传递而降温、盐上地层热量快速增加而升温。库车前陆盆地三叠系—侏罗系烃源岩主要发育区被厚度超过1 500m的古近系—新近系膏盐岩覆盖，中间相隔白垩系砂、泥岩。地层温度实测数据统计表明，紧邻古近系膏盐岩的地层温度出现明显跳跃，膏盐岩及盐上构造层的地温梯度大于盐下构造层白垩系的地温梯度。膏盐岩不发育的地区具有单一的地温梯度。深部烃源岩热演化史数值模拟表明，随膏盐岩厚度增大，盐下深层侏罗系烃源岩地层温度和热演化程度均降低，1 500m膏盐岩可使侏罗系烃源岩地层温度和R_O值分别降低15℃、0.35%;受岩盐的影响，深部三叠系—侏罗系烃源岩生气高峰期延迟至库车中晚期—第四纪，生气中心位于克拉苏构造带，与晚期盐下大规模构造圈闭的有效期相匹配，有利于盐下大气田的形成。烃源岩热演化史模拟结果与现今发现的天然气成熟度分布也十分吻合。

关键词： 岩盐; 热导率; 烃源岩; 热演化; 库车前陆盆地

本文引用格式

卓勤功, 赵孟军, 李勇, 鲁雪松, 方世虎 . 库车前陆盆地古近系岩盐对烃源岩生气高峰期的迟缓作用及其意义[J]. 天然气地球科学, 2014 , 25(12) : 1903 -1912 . DOI: 10.11764/j.issn.1672-1926.2014.12.1903

Abstract

The thermal conductivity of evaporites is two to four times greater than that of other sedimentary rocks.Strong heat conduction through evaporites can increase the geothermal gradient above the evaporities,and decrease the geothermal gradient below evaporites.Most Triassic-Jurassic hydrocarbon source rocks are overlain by over 1 500m thick Tertiary evaporites interlayered with Cretaceous sandstones and mudstones in the Kuqa Foreland Basin.Directly measured strata temperatures indicate an obvious jump in the the geothermal gradient near the Paleogene evaporates.The geothermal gradient above the evaporites is greater than those below the evaporites.There is a single geothermal gradient in the area without evaporates.Simulations of the thermal evolution of source rocks indicate that,with the increase of the thickness of halite and anhydrite,the strata temperatures and vitrinite reflectance in Jurassic source rocks will decrease accordingly.This indicates that the evaporites provide a preferred upward heat transport pathway.If the thickness of evaporites reaches 1 500m,the temperatures and vitrinite reflectance of Jurassic source rocks will decrease by 15℃ and 0.35% respectively.Evaporites delayed the gas generation peak of Jurassic-Triassic source rocks to the Middle-Late Kuqa Era-Quaternary Period.The gas generation center is located in the Kalasu tectonic belt.Therefore,the speculated natural gas generation time not only correlates with the formation period of the evaporite-related structural trap,but also coincides with the maturation of current exploited gas reserves,which is favorable for the formation of large gas fields under evaporites.

Key words： Evaporites; Thermal conductivity; Source rock; Thermal evolution; Kuqa Foreland Basin

参考文献

［1］Ulisses T M,Carry D K.Development of sediment overpressure and its effective thermal maturation:Application to the Gulf of Mexico Basin[J].AAPG Bulletin,1996,80(9):1367-1396.
［2］Lv Xiuxiang,Jin Zhijun,Zhou Xinyuan,et al.Accumulation associated with evaporite in Kuqa Depression,Tarim Basin[J].Petroleum Exploration and Development,2000,27(4):20-21.［吕修祥,金之钧,周新源,等.塔里木盆地库车坳陷与膏盐岩相关的油气聚集[J].石油勘探与开发,2000,27(4):20-21.］
［3］Qiu Nansheng.Characters of thermal conductivity and radiogenic heat production rate in basins of northwest China[J].Chinese Journal of Geology,2002,37(2):196-206.［邱楠生.中国西北部盆地岩石热导率和生热率特征[J].地质科学,2002,37(2):196-206.］
［4］Wang Liangshu,Li Cheng,Liu Shaowen,et al.Terrestrial heat flow distribution in Kuqa foreland basin,Tarim,NW China[J].Petroleum Exploration and Development,2005,32(4):79-83.［王良书,李成,刘绍文,等.库车前陆盆地大地热流分布特征[J].石油勘探与开发,2005,32(4):79-83.］
［5］Han Dongmei.Evaporite effects on strata temperature and hydrocarbon evolution in Dongying Sag[J].West-China Exploration Engineering,2011,9(4):84-86,89.［韩冬梅.东营凹陷膏盐层对地温及成烃演化的影响[J].西部探矿工程,2011,9(4):84-86,89.］
［6］Yu Z,Lerche I,Lowrie A.Thermal impact of salt:simulation of thermal anomalies in the Gulf of Mexico[J].Pageoph,1992,138(2):181-192.
［7］Jin Qiang,Zhu Guangyou.Progress in research of deposition of oil source rocks in saling lakes and their hydrocarbon generation[J].Geological Journal of China Universities,2006,12(4):483-492.［金强,朱光有.中国中新生代咸化湖盆烃源岩沉积的问题及相关进展[J].高校地质学报,2006,12(4):483-492.］
［8］Zheng Deshun,Li Minglong,Cai Jingong,et al.Distribution of deep evaporite and its influence on thermal evolution of source rock in Dongying Sag[J].Petroleum Geology and Engineering,2011,25(4):1-3.［郑德顺,李明龙,蔡进功,等.东营凹陷深层膏盐岩分布及其对烃源岩热演化的影响[J].石油地质与工程,2011,25(4):1-3.］
［9］Sun Bo,Jiang Youlu,Zhang Shanwen,et al.Distribution of evaporite and its influence on strata temperature in northern of Dongpu Depression[J].Petroleum Geology and Recovery Efficiency,2012,19(1):28-30.［孙波,蒋有录,张善文,等.东濮凹陷北部膏盐岩分布特征及其对地层温度的影响[J].油气地质与采收率,2012,19(1):28-30.］
［10］Li Mei,Bao Jianping,Wang Hai,et al.The analysis on the maturity parameters of source rock and hydrocarbons in Kuqa foreland basin,Tarim Basin[J].Natural Gas Geoscience,2004,15(4):367-378.［李梅,包建平,汪海,等.库车前陆盆地烃源岩和烃类成孰度及其地质意义[J].天然气地球科学,2004,15(4):367-378.］
［11］Guo Jigang,Pang Xiongqi,Liu Dandan,et al.Hydrocarbon expulsion for Middle-Lower Jurassic coal measures and evaluation of potential resource in Kuqa Depression[J].Natural Gas Geoscience,2012,23(2):327-334.［郭继刚,庞雄奇,刘丹丹,等.库车坳陷中、下侏罗统煤系烃源岩排烃特征及资源潜力评价[J].天然气地球科学,2012,23(2):327-334.］
［12］Neng Yuan,Qi Jiafu,Xie Huiwen,et al.Structural characteristics of northern margin in Kuqa Depression,Tarim Basin[J].Geological Bulletin of China,2012,31(9):1510-1519.［能源,漆家福,谢会文,等.塔里木盆地库车坳陷北部边缘构造特征[J].地质通报,2012,31(9):1510-1519.］
［13］Yang Shuchun,Lu Qingzhi,Song Chuanzhen,et al.Organic maturation evolution of Mesozoic source rock in Kuqa foreland basin and its influence factors[J].Oil ＆ Gas Geology,2005,26(6):770-777.［杨树春,卢庆治,宋传真,等.库车前陆盆地中生界烃源岩有机质成熟度演化及影响因素[J].石油与天然气地质,2005,26(6):770-777.］
［14］Wei Guoqi,Jia Chengzao,Shi Yangshen,et al.Tectonic Characteristics and petroleum prospects of Cenozoic compound rejuvenated foreland basins in Tarim Basin[J].Acta Geologica Sinica,2000,74(2):123-133.［魏国齐,贾承造,施央申,等.塔里木新生代复合再生前陆盆地构造特征与油气[J].地质学报,2000,74(2):123-133.］
［15］Wang Zhaoming.Discussion of ceiling effect in foreland thrust belt of Kuqa Depression[J].Natural Gas Geoscience,2013,24(4):671-677.［王招明.试论库车前陆冲断带构造顶蓬效应[J].天然气地球科学,2013,24(4):671-677.］
［16］Xu Zhenping,Wu Chao,Ma Like,et al.Salt-related structure styles and their genetic mechanism in the middle of Kuche Depression[J].Natural Gas Geoscience,2009,20(3):2567-361.［徐振平,吴超,玛丽克,等.库车坳陷中部盐相关构造样式及其成因机制[J].天然气地球科学,2009,20(3):356-361.］
［17］Zhuo Qingong,Li Yong,Song Yan,et al.Condensate characteristics and its significance for hydrocarbon accumulation in the Kelasu structural belt[J].Natural Gas Geoscience,2012,23(6):1097-1103.［卓勤功,李勇,宋岩,等.克拉苏构造带凝析油特征及其对油气成藏的指示意义[J].天然气地球科学,2012,23(6):1097-1103.］
［18］Bao Jianping,Zhu Cuishan,Zhang Qiucha,et al.Geochemical characteristics of crude oil in uplift belt on Kuqa Depression[J].Journal of Oil and Gas Technology,2007,29(4):40-44.［包建平,朱翠山,张秋茶,等.库车坳陷前缘隆起带上原油地球化学特征[J].石油天然气学报,2007,29(4):40-44.］
［19］Zhao Mengjun,Zhang Baomin.Source rocks for a giant gas-accumulation area in Kuqa foreland basin[J].Chinese Journal of Geology,2002,37(Z1):35-44.［赵孟军,张宝民.库车前陆坳陷形成大气区的烃源岩条件[J].地质科学,2002,37(增1):35-44.］
［20］Wang Liangshu,Li Cheng,Liu Shaowen,et al.Geotemperature gradient distribution in Kuqa foreland basin,north of Tarim,China[J].Chinese Journal of Geophysics,2003,46(3):403-407.［王良书,李成,刘绍文,等.塔里木盆地北缘库车前陆盆地地温梯度分布特征[J].地球物理学报,2003,46(3):403-407.］
［21］Jensen P K.Analysis of temperature field around the salt diapirs[J].Geothermics,1990,19(3):273-283.
［22］Moldowan J M,Peters K E,Carlson R M K,et al.Diverse applications of petroleum biomarker maturity parameters[J].Arabian Journal for Science and Engineering,1994,19(5):273-298.
［23］Chen J,Fu J,Sheng G,et al.Diamondoid hydrocarbon ratios: Novel maturity indices for highly mature crude oils[J].Organic Geochemisty,1996,25(3):179-190.
［24］Bao Jianping,Zhu Cuishan,Zhang Qiucha,et al.Geochemical characteristics of natural gas from different structural units in Kuqa Depression,Tarim Basin[J].Oil ＆ Gas Geology,2007,28(5):664-668.［包建平,朱翠山,张秋茶,等.塔里木盆地库车坳陷不同构造单元天然气地球化学特征[J].石油与天然气地质,2007,28(5):664-668.］
［25］Charles E B,Robert H G.Fluid-inclusion technique for determining maximum temperature in calcite and its comparison to the vitrinite reflectance geothermometer[J].Geology,1990,18(10):1003-1006.
［26］Zhao Lin,Qin Shengfei.On thermal evolution of Jurassic source rocks in Kuqa Depression,Tarim Basin[J].Geology Geochemistry,1999,27(3):1-4.［赵林,秦胜飞.库车坳陷侏罗系烃源岩热演化研究[J].地质地球化学,1999,27(3):1-4.］
［27］Liang Digang,Zhang Shuichang,Zhao Mengjun,et al.Accumulation period in Kuqa Depression[J].Chinese Science Bulletin,2002,47(supplement):56-63.［梁狄刚,张水昌,赵孟军,等.库车拗陷的油气成藏期[J].科学通报,2002,47(增刊):56-63.］
［28］Zhuo Qingong,Li Yong,Song Yan,et al.Evolution of Paleogene saline deposits and effectiveness of traps in Kelasu tectonic zone,Kuqa Depression,Tarim Basin[J].Petroleum Geology ＆ Experiment,2013,35(1):42-47.［卓勤功,李勇,宋岩,等.塔里木盆地库车坳陷克拉苏构造带古近系膏盐岩盖层演化与圈闭有效性[J].石油实验地质,2013,35(1):42-47.］

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