摘要
为准确计算油气上窜速度,确保井控安全及保护储层,针对泰国呵叻盆地L31/50区块短起下计算油气上窜速度误差较大问题,通过文献调研及工程资料总结,以迟到时间法计算油气上窜速度为分析对象,分析了迟到时间、气测异常时间、油气层深度等关键参数对计算准确性的影响,并在实践中对关键参数求取的步骤和方法形成了认识。电石实测气体迟到时间比理论计算及常规指示物实测的迟到时间精确性更高,综合后效曲线及全烃值变化求取气测异常时间的方法能大大降低仅通过曲线拐点或峰值点读取带来的计算误差,以对后效有主要影响且最先出现气测异常来确定油气层深度可避免揭开多套层位时的相互干扰。该成果认识在YPT7井测井前进行了应用,误差控制在所需安全作业时间的5%以内,确保了安全作业。以上成果认识对区块准确计算油气上窜速度有一定指导意义。
For accurately calculating oil and gas ascending velocity,ensuring well control safety and protect reservoir,in order to solve the problem of large error in calculating oil and gas ascending velocity by short trip in block L31/50 of Korat Basin of Thailand,through literature research and summary of engineering data,taking oil and gas ascending velocity calculated by lag time method as the analysis object,the influence of key parameters such as lag time,gas logging abnormal time,oil and gas depth on the accuracy of calculation was analyzed in this paper,and an understanding of the procedure and method that getting key parameters was formed in practice.Gas lag time measured by calcium carbide is more accurate than that measured by theoretical calculation and conventional indicators,the method of getting gas logging abnormal time through trip gas logging curve and variation of the total hydrocarbon value can greatly reduce the calculation error caused by reading only the inflection point or peak point of the curve,and the depth of the reservoir is determined by which has a major effect on the trip gas logging and shows gas logging abnormal first can avoid mutual interference when uncovering multiple reservoirs.The results have been applied before well logging in the YPT7,the error was controlled within five percent of the required safe operation time,ensuring safe operation.The above achievements have certain guiding significance for accurately calculating oil and gas ascending velocity in this block.
作者
熊文学
惠涛
袁旭
龙安杰
Xiong Wenxue(Shaanxi Yanchang Petroleum International Exploration and Development Engineering Co., Ltd., Xi'an, Shaanxi 710069, China)
出处
《非常规油气》
2020年第6期95-100,共6页
Unconventional Oil & Gas
基金
陕西省科技统筹创新项目“延长难采储量有效动用开发技术研究”(2016KTCL01-12)资助。
关键词
短起下
油气上窜速度
迟到时间
气测异常
油气层深度
short trip
oil and gas ascending velocity
lag time
gas logging abnormal
oil and gas depth
