岩石热声发射和盆模技术研究中扬子区西部下古生界海相页岩最高古地温和热成熟史

doi:10.7623/syxb201401006

石油学报 ›› 2014, Vol. 35 ›› Issue (1): 58-67.DOI: 10.7623/syxb201401006

岩石热声发射和盆模技术研究中扬子区西部下古生界海相页岩最高古地温和热成熟史

张建坤¹, 何生¹, 易积正², 张柏桥², 张士万², 郑伦举³, 侯宇光¹, 王亿¹

1. 中国地质大学构造与油气教育部重点实验室湖北武汉 430074;
2. 中国石油化工股份有限公司江汉油田分公司湖北潜江 433124;
3. 中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所江苏无锡 214151

收稿日期:2013-07-21 修回日期:2013-10-15 出版日期:2014-01-25 发布日期:2013-12-09
通讯作者: 何生，男，1956年1月生，1982年毕业于武汉地质学院石油专业，现为中国地质大学（武汉）教授、博士生导师，主要从事油气地质教学和科研工作。Email：shenghe@cug.edu.cn
作者简介:张建坤，男，1984年3月生，2007年获长江大学学士学位，现为中国地质大学（武汉）博士研究生，主要从事页岩气地质和烃源岩评价工作。Email：sparkler1984@126.com
基金资助:
国家重大科技专项（2011ZX05005-002）、国家自然科学基金青年科学基金项目（No.41302111）和中国石油化工股份有限公司江汉油田分公司科研项目资助。

Rock thermo-acoustic emission and basin modeling technologies applied to the study of maximum paleotemperatures and thermal maturity histories of Lower Paleozoic marine shales in the western middle Yangtze area

Zhang Jiankun¹, He Sheng¹, Yi Jizheng², Zhang Baiqiao², Zhang Shiwan², Zheng Lunju³, Hou Yuguang¹, Wang Yi¹

1. Key Laboratory of Tectonics & Petroleum Resources of the Ministry of Education, China University of Geosciences, Wuhan 430074, China;
2. Sinopec Jianghan Oilfield Company, Qianjiang 433124, China;
3. Wuxi Research Institute of Petroleum Geology, Sinpoec Research Institute of Petroleum Exploration & Production, Wuxi 214151, China

Received:2013-07-21 Revised:2013-10-15 Online:2014-01-25 Published:2013-12-09

摘要/Abstract

摘要：

中扬子地区西部下古生界海相页岩热演化程度高，有机显微组分中无镜质组，沥青反射率具有不确定性，故热成熟度较难确定。综合运用岩石热声发射实验与干酪根红外光谱，并结合盆地模拟技术对中扬子地区西部典型井下古生界海相页岩经历的最高古温度及热演化成熟史进行了恢复。样品的热声发射信号随温度的升高变化显著，热凯瑟尔（Kaiser）效应明显；下寒武统水井沱组经历的最高古温度范围为293~324℃，上奥陶统五峰组—下志留统龙马溪组为210~256℃。同时利用二次加温验证热Kaiser效应敏感，表明热声发射技术可用于岩石经历的最高古地温的测定。在对典型井的下古生界海相页岩热演化成熟史模拟中结合最高古温度作为约束条件所得结果表明，模拟计算的下寒武统水井沱组和上奥陶统五峰组—下志留统龙马溪组镜质体反射率分别为4.0% ~4.5% 和2.6% ~3.2% ，处于高演化过成熟阶段，与干酪根红外光谱分析得出的有机质成熟度结果一致。

关键词: 中扬子地区西部, 下古生界海相页岩, 岩石热声发射, 盆地模拟, 干酪根红外光谱, 最高古地温, 热成熟史

Abstract:

Shales of Lower Paleozoic marine strata in the western middle Yangtze area are considered to be of a high degree of thermal evolution. It is, however, very difficult to accurately determine their thermal maturities (vitrinite reflectance, R_o) due to the lack of vitrinite in organic macerals in marine shales of these Lower Paleozoic formations. The objective of the present study is to restore the maximum paleogeotemperature experienced by these shales and then to reconstruct their thermal evolutionary histories using the basin modeling technology with the data obtained from thermo-acoustic emission experiments and kerogen FTIR (Fourier transform infrared spectroscopy) analysis. The results of thermo-acoustic emission experiments illustrated that Lower Paleozoic marine shales have a good thermal Kaiser effect and the rock thermo-acoustic emission signal varies with geotemperatures remarkably. For instance, the maximum paleogeotemperature experienced by the Lower Cambrian Shuijingtuo Formation ranges from 293℃ to 324℃, while the maximum paleogeotemperature of the Upper Ordovician Wufeng Formation and Lower Silurian Longmaxi Formation ranges from 210℃ to 256℃. Furthermore, the sensitivity of the thermal Kaiser effect was tested by reheating experiments, which suggested that the thermo-acoustic emission could be applied to the measurement of maximum paleogeotemperatures experienced by marine shales. Considering the measured maximum paleotemperature as a constraint, in typical well simulation of the thermal maturity modeling of Lower Paleozoic marine shales, the calculation results of the thermal maturity modeling demonstrated that the simulated values of vitrinite reflectance (R_o) for the Lower Cambrian and Upper Ordovician-Lower Silurian marine shales range from 4.0% to 4.5% and 2.6% to 3.2%, respectively. Therefore, the organic matter maturities of marine shales in the Lower Cambrian Shuijingtuo Formation, Upper Ordovician Wufeng Formation and Lower Silurian Longmaxi Formation are all in a high-maturity to overmature stage of thermal evolution, which is consistent with the data obtained from the kerogen FTIR analysis of the Lower Paleozoic marine formations.

Key words: the western middle Yangtze area, Lower Paleozoic marine shale, rock thermo-acoustic emission, basin modeling, kerogen FTIR, maximum paleogeotemperature, thermal maturity history

中图分类号:

TE112.11

张建坤, 何生, 易积正, 张柏桥, 张士万, 郑伦举, 侯宇光, 王亿. 岩石热声发射和盆模技术研究中扬子区西部下古生界海相页岩最高古地温和热成熟史[J]. 石油学报, 2014, 35(1): 58-67.

Zhang Jiankun, He Sheng, Yi Jizheng, Zhang Baiqiao, Zhang Shiwan, Zheng Lunju, Hou Yuguang, Wang Yi. Rock thermo-acoustic emission and basin modeling technologies applied to the study of maximum paleotemperatures and thermal maturity histories of Lower Paleozoic marine shales in the western middle Yangtze area[J]. ACTA PETROLEI SINICA, 2014, 35(1): 58-67.

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岩石热声发射和盆模技术研究中扬子区西部下古生界海相页岩最高古地温和热成熟史

Rock thermo-acoustic emission and basin modeling technologies applied to the study of maximum paleotemperatures and thermal maturity histories of Lower Paleozoic marine shales in the western middle Yangtze area

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