高精度三维地震资料在低位序潜山储层预测中的应用——以沾化地区为例
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摘要
在胜利油田沾化地区,由于受多期构造运动叠加的影响,发育了高、中、低多位序潜山。低位序潜山埋藏深,一般大于3800m,成藏条件好,但勘探程度低。为此,在沾化地区开展了深层潜山高精度三维地震勘探,获得了构造清晰、信息丰富的高精度三维地震资料,在此基础上进行了低位序潜山储层预测。通过对高精度三维地震资料潜山层位的准确标定和精细构造解释,落实了低位序潜山顶面和内幕构造形态;利用正演模拟结果和钻井统计信息建立了缝洞型储层与地球物理特征之间的关系,探讨了潜山储层的反射特征;利用裂缝预测技术、属性分析技术预测了有利储层发育区,部署钻探的渤深6-12井,获得产油180t/d的工业油流。
Multi-order (high,middle,and low orders) buried hills were developed under the superposed effects of multi-stage structural ach tivities in Zhanhua area,Shengli oilfield.Most of the low-order buried hills are deeply buried with a depth of more than 3,800 m. Although these kinds of buried hills have good reservoir forming conditions,their exploration degree is quite low.Therefore,the high precision 3D seismic exploration of deeply buried hills was car- ried out in Zhanhua area,obtaining a lot of high precision 3D seis- mic data with clear structure and abundant information.On this basis,low-order-buried-hill reservoirs were predicted.Through the accurate calibration and fine structure interpretation of high preci- sion 3D seismic data,the top and inside shape of low-order buried hills were identified.The relationship between fracture-cave reser- voir and geophysical characteristics was established by using for- ward modeling results and drilling information and the reflection characteristics of buried hill reservoirs were probed.Fracture pre- diction technology and property analysis method were used to pre- dict favorable reservoir-developed area.The deployed well Bosh- en6-12 was drilled and obtained an industrial flow of 180 t/d.
引文
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