冀中探区地质设计前期风险分析预测

Risk Analysis and Prediction in the Early Stage of Geological Design in Jizhong Exploration Area

钻井地质设计是钻井工作的基础,准确、完善的设计才能满足地质需求,才能对区域地质风险、工程风险进行有效的提示。为提升探井风险预测提示率,通过开展重点区带地层压力分析与预测探索、区域录井难点分析研究,对施工过程中存在的风险进行有效提示;强化地质工程结合,在保障安全钻井的前提下,优化降低钻井液密度,进一步完善区域设计模板,优选满足地质勘探需求的录井技术手段,从而达到保护油气层、准确及时发现油气显示的目的。开展区域风险分析预测及钻井液密度优化研究以来,累计完成129口井设计,冀中探区地质设计风险预测提示率100%,助力油气显示发现率100%,剖面符合率、解释符合率逐年提升,单井完钻用时提速显著。

Drilling geological design is the basis of drilling work.Accurate and perfect design can meet geo-logical needs and effectively prompt regional geological risks and engineering risks.In order to improve the risk prediction prompt rate of exploration wells,the risks existing in the construction process are effectively prompted through the analysis and prediction of formation pressure in key areas and the analysis and re-search of regional logging difficulties.Strengthen the combination of geological engineering,optimize and reduce the drilling fluid density on the premise of ensuring safe drilling,further improve the regional design template,and optimize the logging technical means to meet the needs of geological exploration,so as to protect the oil and gas reservoir and find the oil and gas display accurately and timely.Since carrying out regional risk analysis and prediction and drilling fluid density optimization research,129 well designs have been completed in total.The risk prediction prompt rate of geological design in Jizhong exploration area is 100%,the discovery rate of oil and gas display is 100%,the profile coincidence rate and interpretation coincidence rate have increased year by year,and the drilling speed of single well has increased significantly.