井间地震技术在樊124井区的应用

The application of crosswell seismic in Fan 124 well field

1. 中国科学院地质与地球物理研究所,北京100101;2. 中国石化胜利油田开发管理部,山东东营257000;3. 中国石化胜利油田物探研究院,山东东营257022

1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101, China;2. Oil and Gas Development Department, SINOPEC Shengli Oilfield Company Limited, Dongying 257000, China;3. Geophysical Research Institute of SINOPEC Shengli Oilfield Company Limited, Dongying 257022, China

井间地震技术是油气田勘探开发领域的一项新技术,它是将震源系统置入井中激发并在另一口或多口井中接收地震波,通过对记录的地震波走时、振幅和频率等信息的处理,并结合测井、地质和地面地震等资料进行解释,最终得到井间地下介质的结构特征和物性变化情况。为了掌握胜利油田樊124井区断层的存在和单个砂体连通情况,采集了3对井的高质量原始井间地震资料,并对其进行了直达波旅行时速度层析反演和反射波成像处理,获得高分辨率的井间速度层析剖面与反射波成像剖面。通过综合解释,对樊124井区的井间储集层的横向分布与连通性、小断层、砂泥岩薄互层等复杂精细的地质现象有了清晰明确的认识,为提高油气采收率(EOR)及优化油气田开发方案提供了依据。

Crosswell seismic technology is a new technology in hydrocarbon exploration and development. This technology deploys source in one well, and receivers in other well(s). The subsurface structural features and lithology are derived from the travel times, amplitudes, and frequencies of the records as well as logging, geologic, and surface seismic information. To gain an insight into the existence of faults and connectivity of a single sand body in Fan 124 well field, Shengli Oilfield, crosswell seismic data acquired in 3 wells was processed by velocity tomography of direct arrivals and reflection imaging. Through an integrated interpretation, we reached a clearer understanding about the geological conditions of Fan 124 well field such as lateral distribution and connectivity of interwell reservoir, minor faults, interbeds of sand and shale, which provides evidences for schemes of increasing EOR and optimizing oil gas field development.