渤海油田复杂砂砾岩储层油气层识别技术

Identification of oil and gas reservoirs in complex conglomerate reservoirs in Bohai Oilfield

李战奎 徐长贵 戴珩 马福罡

LI Zhankui XU Changgui DAI Heng MA Fugang

中海油能源发展股份有限公司工程技术分公司 中海石油(中国)有限公司天津分公司

Engineering Technology Company of CNOOC Energy Technology & Services Limited, Tianjin 300459, China Tianjin Branch of China National Offshore Oil Co., Ltd., Tianjin 300459, China

随着渤海油田勘探层位的加深，主要勘探层位的岩性由浅部地层的砂泥岩，逐渐过渡为中深部地层的砂砾岩、火成岩及变质岩等复杂岩性。中深部储层的物性及孔隙类型较为复杂，录井油气显示弱、钻井参数不明显等现象尤为凸出，这对油气的发现和识别提出了更多挑战。结合多口中深层探井资料，针对所钻遇的复杂砂砾岩储层进行研究、分析、总结出了一套针对该类复杂储集层油气显示的识别方法，归纳了复杂储层中油气水的分布规律及录井响应特征，并形成了以气测录井技术和三维定量荧光技术为主、地化亮点法和纵向参数变化趋势法为辅的油气层识别技术。该识别技术在渤海油田的成功应用为中深层勘探决策的制定以及下一步生产方案的实施提供了有力依据。

With the deepening of the exploration in the Bohai Oilfield, the mainlithology of the formation gradually changes from the sandstone and mudstone in the shallow strata to the complex lithology of the glutenite, igneous and metamorphic rocks in the middle and deep strata.The middle deep and deep reservoirshave the features of complexphysical properties and pore types, weak oil and gas show in logging and inconspicuous drilling parameters, which pose challenges to the discovery and identification of oil and gas.Based on thedataof severalmiddle deep and deep exploration wells, studies and analyses on the complex glutenite reservoirs are conducted.A set of identification methods for oil and gas in such complex reservoirs is established.The oil, gasand waterdistribution in complex reservoirsand the corresponding logging response characteristics is summarized.A gas reservoir identification technology is developed based on gas logging technology and three-dimensional quantitative fluorescence technology assisted by geochemical brightness method and longitudinal parameter change trend method.The successful application of the identification technology in Bohai Oilfield provides a strong basis for the decision-makingof middledeep and deep reservoir exploration and the implementation of the laterproduction plan.

10.13639/j.odpt.2018.S0.010