潜江凹陷新沟嘴组地层滚动勘探实践及认识
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摘要
潜江凹陷潜南地区新沟嘴组构造复杂、储层发育且分布复杂,探明率较低,勘探程度远低于同凹陷的潜江组。针对其地质特征及研究难点,在潜江凹陷新沟嘴组开展了滚动勘探开发技术研究,目的是发现新储量保持油田稳产。利用空间"十字"交叉法解释断层,空间速度场取代综合速度量板进行时深转换等方法提高了马王庙等地区复杂构造带地震资料的解释精度;利用多条贯穿全区的任意剖面细分若干个单砂层进行对比,阐述了砂体展布规律;开展地层组合与地震波形特征对比应用,地震属性与沉积微相相关分析等地震储层预测技术,准确描述了隐蔽性圈闭,并通过转变思路,将寻找单一构造油藏向构造+岩性油藏转变,发现了26个"断层切香肠"式构造及构造-岩性圈闭,优选钻探7口滚动井,发现了4个含油区块,探明石油地质储量228×104t,控制地质储量384×104t,建产能2.81×104t。
Structure and reservoir distribution were complex in the southern of Qianjiang Depression,the exploration rate was much lower than that of Qianjiang Formation in the same depression.In order to discover new reservoirs and keep stable production,the research of rolling exploration and development was performed in Xingouzui Formation of Qianjiang Depression.The application of space "crossing method" greatly improved seismic data interpretation accuracy of complex structure in Mawangmiao and other regions,and space velocity field was applied in time-depth conversion for replacing the integrated speed board.By comparing the independent single sand formation in any section through the region,the rule of sand-body distribution can be revealed.By adopting of the technology of seismic reservoir prediction such as comparison and application of stratigraphic combination with seismic waveform characteristics,correlation analysis of seismic attributes and sedimentary microfacies,etc,the hidden traps were accurately described.Twenty-six structures like faults cutting the sausage and structural-lithologic traps were found by transforming thinkings from looking for a single structural reservoir to searching for the structural + lithologic reservoir.Seven wells are optimized as production well and 4 oil blocks are found.proved geological oil reserves is about 228 × 104t,and controlled geological reserves is 384 × 104t with 2.81 × 104 t of production.
Structure and reservoir distribution were complex in the southern of Qianjiang Depression,the exploration rate was much lower than that of Qianjiang Formation in the same depression.In order to discover new reservoirs and keep stable production,the research of rolling exploration and development was performed in Xingouzui Formation of Qianjiang Depression.The application of space "crossing method" greatly improved seismic data interpretation accuracy of complex structure in Mawangmiao and other regions,and space velocity field was applied in time-depth conversion for replacing the integrated speed board.By comparing the independent single sand formation in any section through the region,the rule of sand-body distribution can be revealed.By adopting of the technology of seismic reservoir prediction such as comparison and application of stratigraphic combination with seismic waveform characteristics,correlation analysis of seismic attributes and sedimentary microfacies,etc,the hidden traps were accurately described.Twenty-six structures like faults cutting the sausage and structural-lithologic traps were found by transforming thinkings from looking for a single structural reservoir to searching for the structural + lithologic reservoir.Seven wells are optimized as production well and 4 oil blocks are found.proved geological oil reserves is about 228 × 104t,and controlled geological reserves is 384 × 104t with 2.81 × 104 t of production.
引文
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[4]司马立强.测井地质应用技术[M].北京:石油工业出版社,2002.
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