摘要
含油气盆地深层油气资源丰富,超压发育带往往是深层油气勘探的有利目标,但目前对深层地层压力预测方法的选择还存在误区。针对以上问题,利用平衡深度法、Eaton法和Zhang法对东濮凹陷柳屯洼陷濮深18-8井进行单井地层压力预测。研究结果表明:3种方法计算的地层压力与实测深层地层压力数值相差不大,但平衡深度法计算的地层压力显示3 000m以下地层均发育超压;而Eaton法和Zhang法计算结果显示3 000 m以下共发育3套超压层系,与地层声波时差演化规律相一致。造成3种预测方法结果差异主要因素为选取模型和数据处理方法不同。该研究可准确预测深层地层压力,对该区下一步深层油气藏勘探具有一定的指导意义。
There are abundant hydrocarbon resources in the deep strata of hydrocarbon bearing strata,and overpressure development zones are often the favorable exploration targets of deep oil and gas.At present,however,how to select deep-layer formation pressure prediction methods is not defined clearly yet.To solve this problem,single-well formation pressure prediction was conducted on Well Pushen 18-8 in Liutun trough of Dongpu sag by means of balance depth method,Eaton method and Zhang method.It is shown that the formation pressure calculated by three methods is basically the same as the measured value.However,the formation pressure calculated by balance depth method shows that the strata below 3 000 m are overpressure developed while the calculation results of Eaton method and Zhang method show that 3 overpressure series of strata are totally developed below 3 000 m,which is consistent with the evolution law of interval transit time.The main factors leading to the different prediction results of three methods are different models and data processing methods are adopted in different methods.By virtue of the research results,the formation pressure of deep strata can be predicted accurately.The research is of instructive significance to the further exploration of deep oil and gas reservoirs in this area.
作者
徐源
庞雄奇
胡涛
徐田武
郑晓薇
Xu Yuan;Pang Xiongqi;Hu Tao;Xu Tianwu;Zheng Xiaowei(State Key Laboratory of Petroleum Resources and Prospecting,Beijing 102249,China;China University of Petroleum(Beijing),Beijing 102249,China;Sinopec Zhongyuan Oilfield Company,Puyang,Henan 457000,China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2018年第4期46-50,共5页
Special Oil & Gas Reservoirs
基金
国家重大专项"东濮凹陷油气富集规律与增储领域"(2016ZX05006004)
中国石油化工股份公司攻关项目"东濮凹陷油气富集规律及增储区带研究"(P15022)
关键词
深层地层压力
超压
压力预测方法
声波时差
东濮凹陷
formation pressure of deep strata
overpressure
pressure prediction method
interval transit time
Dongpu sag
