VSP测井在深层特低渗砂岩油藏中的应用

Application of VSP logging in deep ultra-low permeability sandstone reservoirs

随着牛74块开发程度的不断提高,滚动扩边的难度越来越大。该块为岩性-构造油藏,目的层地震反射层的层位标定不准,周边断层的不确定性等因素直接影响到滚动扩边成效,因此针对该块的VSP测井技术攻关显得至关重要。通过该块牛74-19-15井实施VSP测井,加强了地震资料的精细解释,确定了断块是否存在或其确切位置,明确了构造形态和断层展布,指导了油藏的扩边工作。

With the increasing of development degree of Block Niu 74, it is getting more and more difficult to expand the reserves exploitation. The block is a lithologic-structural reservoir. Some factors, such as the inaccurate position calibrating of the seismic reflection horizons on intended zones and the uncertainty of surrounding faults, directly impact on the effect of expanding reserves exploitation. So the VSP logging technology research seems very important in regard to the block. The fine explanation effect of seismic data has been improved and the exact position of faults has been determined through the implementation of VSP logging technology in Well Niu 74-19-15 of the block. The structural features and the distribution of faults have been defined, which has a very important significance for expanding reserves exploitation.