柴达木盆地英雄岭地区硫化氢形成机理及分布预测

doi:10.12108/yxyqc.20200509

岩性油气藏 ›› 2020, Vol. 32 ›› Issue (5): 84–92.doi: 10.12108/yxyqc.20200509

柴达木盆地英雄岭地区硫化氢形成机理及分布预测

田继先¹, 赵健², 张静², 孔骅¹, 房永生³, 曾旭¹, 沙威², 王牧²

1. 中国石油勘探开发研究院, 北京 100083;
2. 中国石油青海油田分公司勘探开发研究院, 甘肃敦煌 736202;
3. 中国石油青海油田分公司勘探事业部, 甘肃敦煌 736200

收稿日期:2019-10-31 修回日期:2020-03-02 出版日期:2020-10-01 发布日期:2020-08-08
第一作者:田继先(1981-),男,博士,高级工程师,主要从事天然气地质方面的研究工作。地址:(065007)河北省廊坊市广阳区中国石油勘探开发研究院廊坊院区。Email:tjx69@petrochina.com.cn。
基金资助:
中国石油天然气股份有限公司科技重大专项“柴达木盆地建设高原大油气田勘探开发关键技术研究与应用”（编号：2016E-0102）资助

Formation mechanism and distribution prediction of hydrogen sulfide in Yingxiongling area,Qaidam Basin

TIAN Jixian¹, ZHAO Jian², ZHANG Jing², KONG Hua¹, FANG Yongsheng³, ZENG Xu¹, SHA Wei², WANG Mu²

1. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
2. Research Institute of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang 736202, Gansu, China;
3. Department of Exploration, PetroChina Qinghai Oilfield Company, Dunhuang 736202, Gansu, China

Received:2019-10-31 Revised:2020-03-02 Online:2020-10-01 Published:2020-08-08

摘要/Abstract

摘要： 近年来，柴达木盆地英雄岭地区下干柴沟组上段（E₃²）咸化湖相碳酸盐岩中发现了含硫化氢气藏。为了明确硫化氢的成因机理和有效预测其分布，开展了天然气地化特征分析和模拟实验。结果表明：①英雄岭中部地区硫化氢为硫酸盐热化学还原（TSR）产物，温度越高，生成量越大。烃源岩的发育、广泛分布的膏盐岩地层、较高的地温梯度及大量发育的孔隙型储层为含硫化氢气藏的形成提供了有利条件。②受晚喜山运动整体抬升影响，现今地层在历史成藏时期所经历的最高古地温更高。③E₃²沉积期，湖盆中心岩盐发育，油气封盖条件较好，盐下孔隙型储层的发育有利于硫化氢的富集，综合预测英雄岭中部—干柴沟一带的盐下地层为硫化氢富集区。该研究成果对含硫化氢气藏的勘探部署与生产安全均具有重要意义。

关键词: 硫化氢, 硫酸盐热化学还原, 湖相碳酸盐, 咸化湖, 英雄岭地区, 柴达木盆地

Abstract: In recent years,gas reservoirs containing high hydrogen sulfide have been found in lacustrine carbonate rocks in the upper member of the lower Ganchaigou Formation(E₃²)in Yingxiongling area of Qaidam Basin. In order to clarify the genetic mechanism of hydrogen sulfide and predict its distribution effectively,the geochemical characteristic analysis of natural gas and simulated experiment were carried out. The results show that:(1)Hydrogen sulfide is a product of thermochemical sulphate reduction(TSR)in the central of Yingxiongling area,and the higher the temperature,the greater the production. The development of source rocks,the widely distributed salt-rock formation,the high geothermal gradient and the large number of developed pore reservoirs provide favorable conditions for the formation of hydrogen sulfide gas reservoirs.(2)Under the influence of the overall uplift of the Late Himalayan movement,the maximum paleogeothermal temperature experienced by the present strata in historical accumulation period is higher.(3)During E₃² deposition period,the rock salt developed in the center of the lake basin,and the oil and gas sealing conditions are good. The development of the pre-salt pore reservoirs is conducive to the enrichment of hydrogen sulfide. It was comprehensively predicted that the pre-salt strata in the central of Yingxiongling-Ganchaigou area are hydrogen sulfide enrichment areas. The research results are of great significance for the exploration,deployment and production safety of hydrogen sulfide gas reservoir.

Key words: hydrogen sulfide, thermochemical sulphate reduction, lacustrine carbonate, salinized lake, Yingxiongling area, Qaidam Basin

中图分类号:

TE122.1

田继先, 赵健, 张静, 孔骅, 房永生, 曾旭, 沙威, 王牧. 柴达木盆地英雄岭地区硫化氢形成机理及分布预测[J]. 岩性油气藏, 2020, 32(5): 84–92.

TIAN Jixian, ZHAO Jian, ZHANG Jing, KONG Hua, FANG Yongsheng, ZENG Xu, SHA Wei, WANG Mu. Formation mechanism and distribution prediction of hydrogen sulfide in Yingxiongling area,Qaidam Basin[J]. Lithologic Reservoirs, 2020, 32(5): 84–92.

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柴达木盆地英雄岭地区硫化氢形成机理及分布预测

Formation mechanism and distribution prediction of hydrogen sulfide in Yingxiongling area,Qaidam Basin

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