文章摘要
海上高温高压地层孔隙压力预测方法研究
Study on Pore Pressure Prediction Method in the Offshore High Temperature and High Pressure Formation
投稿时间:2019-09-09  修订日期:2019-09-09
DOI:
中文关键词: 海上高温高压地层  异常高压  超压成因机制  孔隙压力预测
英文关键词: offshore high temperature and high pressure formation  abnormal high pressure  overpressure mechanism  pore pressure prediction
基金项目:“十三五”国家科技重大专项“莺琼盆地高温高压天然气富集规律与勘探开发关键技术(三期)(No.2016ZX05024-005 );“十三五”中国海洋石油总公司科技重大项目—“莺琼盆地高温高压钻井关键技术研究”(NO.:CNOOC-KJ 135 ZDXM 24 LTD ZJ 01)。
作者单位E-mail
李文拓 中海石油中国有限公司湛江分公司 250354011@qq.com 
李中 中海石油中国有限公司湛江分公司 lizhong@cnooc.com.cn 
吴涛 中海石油中国有限公司湛江分公司 wutao4@cnooc.com.cn 
邓文彪 中海石油中国有限公司湛江分公司 dengwb2@cnooc.com.cn 
彭海龙 中海石油中国有限公司湛江分公司 penghl4@cnooc.com.cn 
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中文摘要:
      南海北部莺歌海盆地普遍发育异常压力。针对盆地中央凹陷底辟背斜构造带的东方13气田高温高压地层,利用改进的声波速度-密度交会图版对其异常高压形成机制进行了分析,研究认为其泥岩地层主要超压成因机制为欠压实作用、水热增压及化学压实作用,且其对地层异常高压的贡献随垂深变化。基于东方13气田特殊的地质情况,提出了孔隙压力计算的组分模型,利用测井数据对孔隙压力进行了计算。对于砂岩储层,考虑构造起伏的影响,认为其孔隙压力是由泥岩传递与烃柱浮力作用产生的孔压两部分组成,并建立了相关计算模型。研究成果在东方13气田及类似地质与构造气藏具有较高的适用性。
英文摘要:
      Abnormal pressure is generally developed in Yinggehai Basin in the northern South China Sea. The Abnormal formation pressure mechanism is analyzed by using the improved acoustic velocity-density intersection plate model for the high temperature and high pressure formation in the Dongfang 13 gas field, which lies in the central depression of the Yinggehai basin in the north South China Sea. It is believed that the main pore pressure mechanism of the shale formation is undercompaction mechanism, hydrothermal pressurization and chemical compaction mechanism. The contribution of formation pressure mechanism to overpressure is a function of the depth. Based on the special geology and tectonics of Dongfang 13 gas field, the component model of pore pressure calculation is put forward, and the pore pressure is calculated by logging data. For the sandstone reservoirs, considering the effect of tectonic fluctuation, the pore pressure is considered to be composed of the pressure produced by the mudstone transmission and the buoyancy of the hydrocarbon column. The relevant pressure calculation model of sandstone formation is established. The research results have high applicability, accuracy and versatility in Dongfang 13 gas field and similar geological and structural gas reservoirs.
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