新疆石油地质

›› 2017, Vol. 38 ›› Issue (2): 1-1.doi: 10.7657/XJPG20170218

• 论文 •    

碳酸盐岩中固体沥青裂解过程硫元素赋存状态模拟实验

罗厚勇1，2，张大勇3，梁明亮4，刘文汇2，胡文瑄1   

  1. (1.南京大学 地球科学与工程学院,南京 210093;2.中国石化 石油勘探开发研究院 无锡石油地质研究所,江苏 无锡 214126;3.内蒙古自治区一一五地质矿产勘查开发院,内蒙古 乌兰浩特 137400;4.中国地质科学院 地质力学研究所 页岩油气调查评价重点实验室,北京 100081)
  • 出版日期:2019-01-01 发布日期:1905-07-14

Simulating Experiment of Sulfur Occurrence during Pyrolysis of Solid Bitumen in Carbonate Rocks

LUO Houyong1,2 ?ZHANG Dayong3, ?LIANG Mingliang4, ?LIU Wenhui2, ?HU Wenxuan1   

  1. (1.School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu ?210093, China;2. Wuxi Research Institute of Petroleum Geology, Petroleum Exploration and Production Research Institute, Sinopec, Wuxi, Jiangsu 214126, China; 3. 115 Geological Mineral Exploration Institute, Inner Mongolia Autonomous Region, Ulanhot, Inner Mongolia 137400, China; 4.Institute of Geomechaniscs/Key Laboratory of Shale Oil and Gas Geological Survey,Chinese Academy of Geological Sciences,Beijing 100081, China)
  • Online:2019-01-01 Published:1905-07-14

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摘要： 为查明碳酸盐岩储集层固体沥青裂解和热化学硫酸盐还原反应过程中硫元素赋存状态的变化，采集川西北矿山梁地区下寒武统含硫低成熟固体沥青，通过半开放实验体系，模拟了固体沥青的生排烃演化；并利用同步辐射分析技术，对固体产物中硫元素的化学赋存状态进行精确检测。结果表明，固体沥青直接裂解过程中，主要发生了还原态硫化物的氧化反应；在有溶解硫酸盐存在的条件下，形成了H2S和大量的CO2，反映该过程发生了热化学硫酸盐还原反应；伴随实验温度和压力的升高，H2S产率和硫酸盐相对含量的增加，反映实验过程中可能发生了还原态硫化物的氧化反应和氧化态硫酸盐的还原反应。硫酸钙矿物的生成和富集表明，热化学硫酸盐还原反应过程伴随的酸性流体可以对白云岩储集层产生明显的溶蚀作用，可能会生成次生膏盐，高含硫储集层中的膏盐可能是热化学硫酸盐还原反应的反应物。

Abstract: In order to clarify the changes of sulfur occurrence during the pyrolysis of solid bitumen and thermochemical sulfate reduction(TSR) in carbonate reservoirs, some solid sulfur bitumen samples of low maturity were acquired from the Lower Cambrian stratum in Kuangshanliang area of northwestern Sichuan province, and evolutions of hydrocarbon generation and expulsion were simulated with a semi-open experiment system; by using synchrotron radiation technology, the chemical occurrence of sulfur in solid products was detected accurately. The results showed that oxidation reaction mainly occurred during the direct pyrolysis of the solid bitumen; the generated H2S and large amount of CO2 due to the existence of dissolved sulfate indicated that TSR occurred in the pyrolysis process; with the increase of experimental temperature and pressure, the yield of H2S and sulfate increased, which reflected that both oxidation and reduction reactions might occur in the experiment. The calcium sulfate generation and its enrichment showed that the acid fluids associated with TSR would corroded dolomite reservoirs obviously, as a result, the secondary gypsum might be produced and the gypsum in high-sulfur reservoirs could be the reactant of TSR

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