| 摘要: |
| 系统总结异常高压形成机制,分析岩石沉积压实过程的力学关系，在此基础上对异常高压形成机制进行分类。 根据地层加载和卸载时的不同测井参数响应特怔以及构造挤压环境下的典型构造地质特怔，建立一种异常高压形 成机制判别方法。收集南海莺琼盆地一口高温高压井的测并数据,利用该方法对该井进行分析。结果表明:该方法 能够准确判別区分出欠压实、构造挤压和流体膨胀等异常高压形成机制,进而可以为优选地层汛力计算模型提供依 据;该井3.45 km以下地层存在流体膨胀机制造成的异常卨压;利用判别结果选择的压力计算模型能够有效提高地 层压力的计算精度。 |
| 关键词: 异常高压 形成机制 判别方法 应用 |
| DOI：10.3969/j.issn.1673-5005.2012.03.017 |
| 分类号:TE 271 |
| 基金项目:国家“973”重点基础研究发展计划项目(2010CB226704) |
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| Investigation and application of a discrimination method for abnormal high formation pressure forming mechanism |
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YE Zhi1,FAN Hong-hai1,CAI Jun2,JI Rong-yi1,LI Chao-wei1,LIU Gang1
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(1. MOE Key Laboratory of Petroleum Engineering in China University of Petroleum，Beijing 102249, China ;2. CNOOC Zhanjiang Branch，Zhanjiang 524057, China)
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| Abstract: |
| The forming mechanisms of abnormally high formation pore pressure were systematically summarized and the mechanical relation in the sedimentary compaction process was analyzed. The mechanisms of abnormally high formation pore pressure were categorized. A method to discriminate the forming mechanisms of abnormally high pressure was proposed according to the different logging response of the formation's loading and unloading procedure and the geological characteristics of typical structure in tectonic compression environments. The logging data of one well with high temperature and high pressure in Yingqiong Basin at South China Sea were collected. The results show that the mechanisms of under-compaction, tectonic compression and fluid expansion can be determined by this method. A reasonable model to calculate the pore pressure of this well can be selected. There is abnormal high pressure over 3.45 km deep zone，which is caused by fluid expansion mechanism. The precision of pore pressure calculation is significantly improved by using the selected pressure calculation mode. |
| Key words: abnormal high pressure forming mechanisms discrimination method application |
