| 运用压实模拟实验进行埋藏史恢复: 以辽河西部凹陷雷家地区沙四段为例 |
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| 引用本文： | 赵晓阳,代宗仰,李阳,江煜波,宫振超,李甜,黄澜,崔晓磊,周睿,苏靖,黄蕾,周晓龙.运用压实模拟实验进行埋藏史恢复: 以辽河西部凹陷雷家地区沙四段为例[J].地质科技通报,2021,40(6):165. |
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| 作者姓名： | 赵晓阳 代宗仰 李阳 江煜波 宫振超 李甜 黄澜 崔晓磊 周睿 苏靖 黄蕾 周晓龙 |
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| 基金项目： | 中国石油天然气股份有限公司重大科技专项"辽河探区可持续规模增储勘探关键技术研究"2017E-1601 |
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| 摘 要： | 辽河西部凹陷雷家地区具有良好的油气勘探开发潜力，但目前对该地区的埋藏史分析缺乏清晰的认识。运用沉降史的恢复原理对研究区残余地层进行原始厚度的恢复，首先利用声波曲线法和邻层对比方法恢复地层的剥蚀厚度，然后配比5个实验样品（含砾细砂岩、泥质粉砂岩、泥质灰岩、灰质泥岩、泥岩）进行压实模拟实验，根据实验得出样品的孔隙度-深度曲线。利用现有的埋藏资料进行地层骨架厚度计算，并根据骨架体积不变公式，以每个单一岩性分层作为最小单位逐一进行回剥计算，得到各组、段地层在不同地质时期的沉积厚度以及埋藏深度。通过埋藏史分析认为雷家地区新生界地层埋藏过程中，古近系沙河街组时期地层的沉积速率较大，沉积地层较厚，但在沙河街组二段地层抬升遭受剥蚀，地层较薄；东营组时期，地层沉积变缓，末期地层遭受抬升剥蚀；在新近系、第四系时期，地层沉积速率小，沉积的地层厚度不大。
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| 关 键 词： | 雷家地区 埋藏史 地层厚度 古近系 |
| 收稿时间： | 2021-05-19 |
Using compaction simulation experiment to recover burial history: Taking the fourth Member of Shahejie Formation in Leijia area,Western Depression of Liaohe River as an example |
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| Abstract: | The Leijia area in the Western Depression of the Liaohe River has good oil and gas exploration and development potential, but the current analysis of the burial history in this area lacks a clear understanding.This paper uses the recovery principle of subsidence history to restore the original thickness of the remaining stratum in the study area.Firstly, the sonic curve method and the adjacent layer comparison method are used to restore the denuded thickness of the stratum.Sandstone, argillaceous limestone, limestone mudstone, mudstone) were subjected to compaction simulation experiments, and the porosity-depth curve of the sample was obtained according to the experiment.Use the existing burial data to calculate the thickness of the stratum framework, and according to the constant volume formula of the framework, use each single lithological layer as the smallest unit to carry out the backstripping calculation one by one to obtain the sedimentary thickness of each group and section in different geological periods and the depth of burial.According to the analysis of burial history, during the burial process of the Cenozoic strata in Leijia area, the sedimentation rate of the Paleogene Shahejie Formation was higher and the sedimentary strata was thicker, but the second Member of Shahejie Formation was uplifted and eroded and the strata was thin; During the Dongying Formation, the stratum deposition slowed down, and the stratum was uplifted and eroded at the end; in the Neogene and Quaternary, the stratum deposition rate was low, and the thickness of the deposited stratum was not large. |
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