地层超覆油藏勘探技术在陈家庄地区馆陶组的应用
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摘要
通过地质综合分析,明确了陈家庄地区馆下段地层超覆油藏的油气分布规律主要受古地貌、地层超覆边界、岩性变化及储盖组合的控制,而地层和储层空间分布的定量解释是制约地层超覆油藏勘探的关键。根据该区馆下段地层超覆油藏的地质特征,应用相适应的勘探技术,对储层进行了定量分析,即应用残余厚度法、地震沿层切片等技术方法确定了古地貌特征及地层超覆线的位置;应用实际地质模型进行了正演计算,用来确定地层超覆上倾尖灭位置;在精细的测井资料校正基础上进行了测井波阻抗约束反演,用来确定储层厚度和预测孔隙度。应用上述技术方法最终完成了研究区储层厚度的定量解释、储层平面分布和储层孔隙度的预测,探明了馆陶组地层超覆油藏的规模,控制含油面积为33.2 km2,储量为4.740×107t;累积探明含油面积为20.6 km2,储量为2.807×107t,取得了显著的勘探效果和经济效益。
Through the comprehensive geological analysis and seismic method,geologic characteristics and exploration technology were analyzed for the stratigraphic overlap reservoir in Guantao formation of Chenjiazhuang area.The results show that the reservoir is mainly controlled by the palaeogeomorphology,overlap boundary,lithological change and source-reservoir-cap.The quantitative interpretation for the stratum and the reservoir spatial distribution is the key to the reservoir exploration.Palaeogeomorphology characteristics and overlap of beds line position were obtained by residual stratum thickness and the technology of seismic horizon slice.The pinch-out position was determined by the actual geological model for forward computation.Based on the fine log information environment adjustment,the wave impedance constrained inversion was carried on to calculate reservoir thickness and to forecast porosity.Through the above technology,reservoir thickness quantitative interpretation of the research area,the reservoir plane distribution and the reservoir porosity forecast were finally completed.The oil deposit scale of Guantao formation was also verified.The control oil-bearing area is 33.2 km2 and oil geologic reserves are 47.4 million tons.The accumulation proving oil-bearing areas is 20.6 km2 and oil geologic reserves are 28.07 million tons.The remarkable exploration effect and the economic efficiency were obtained through the exploration technology.
Through the comprehensive geological analysis and seismic method,geologic characteristics and exploration technology were analyzed for the stratigraphic overlap reservoir in Guantao formation of Chenjiazhuang area.The results show that the reservoir is mainly controlled by the palaeogeomorphology,overlap boundary,lithological change and source-reservoir-cap.The quantitative interpretation for the stratum and the reservoir spatial distribution is the key to the reservoir exploration.Palaeogeomorphology characteristics and overlap of beds line position were obtained by residual stratum thickness and the technology of seismic horizon slice.The pinch-out position was determined by the actual geological model for forward computation.Based on the fine log information environment adjustment,the wave impedance constrained inversion was carried on to calculate reservoir thickness and to forecast porosity.Through the above technology,reservoir thickness quantitative interpretation of the research area,the reservoir plane distribution and the reservoir porosity forecast were finally completed.The oil deposit scale of Guantao formation was also verified.The control oil-bearing area is 33.2 km2 and oil geologic reserves are 47.4 million tons.The accumulation proving oil-bearing areas is 20.6 km2 and oil geologic reserves are 28.07 million tons.The remarkable exploration effect and the economic efficiency were obtained through the exploration technology.
引文
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[2]周卫红,谢风猛,刘健,等.东营凹陷西北部地层超覆油藏勘探技术研究[J].承德石油高等专科学校学报,2005,l(7):23-26.ZHOUWei-hong,XIE Feng-meng,LIU Jian,et al.Ex-ploration technology research on stratigraphic overlappedoil reservoirs in northwest of Dongying depression[J].Jor-nal of Chengde Petroleum College,2005,1(7):23-26.
[3]范振峰.缓坡带成藏模式研究——以陈家庄地区为例[J].新疆石油天然气,2005,1(1):39-42.FAN Zhen-feng.The Hybrocarbon reservoir forming mod-el of the gentile slope——taking Chenjiazhuang area asexample[J].Journal of Xinjiang Oil&Gas,2005,1(1):39-42.
[4]庄博,刘玉琴.陈家庄凸起北坡三角洲砂体储层描述及含油性分析[J].石油地球物理勘探,2005,40(4):433-437.ZHUANG Bo,LIUYu-qin.Description of delta sand bodyreservoir and oil bearing analysis in north slope of Chenji-azhuang uplift[J].Oil Geophysical Prospecting,2005,40(4):433-437.
[5]谭俊敏,范振峰.箕状断陷湖盆缓坡带勘探方法研究——以陈家庄地区为例[J].断块油气田,2004,11(3):1-3.TAN Jun-min,FANZhen-feng.Study on exploration tech-nique of gently sloping zone in half graben-like rift lakebasin——taking Chenjiazhuang region as example[J].Fault-Block Oil&Gas Field,2004,11(3):1-3.
[6]国景星.陈家庄地区馆陶组高分辨率层序地层分析及沉积微相研究[J].石油大学学报:自然科学版,2005,29(2):1-6.GUO Jing-xing.Analysis of high-resolution sequence stra-tigraphy and sedimentary microfacies of Guantao formationin Chenjiazhuang area[J].Journal of the University ofPetroleum,China(Edition of Natural Science),2005,29(2):1-6.
[7]于建国,韩文功,王金铎.陆相断陷盆地砂岩储层横向预测[M].北京:石油工业出版社,2002:100-102.
[8]刘文岭,牛彦良,李刚,等.多信息储层预测地震属性提取与有效性分析方法[J].石油物探,2002,41(1):101-106.LIU Wen-ling,NIU Yan-liang,LI Gang,et al.Seismicattribute extraction and effectiveness analysis of multi-at-tribute reservoir prediction[J].Geophysical Prospectingfor Petroleum,2002,41(1):101-106.
[9]陈遵德.储层地震属性优化方法[M].北京:石油工业出版社,1998:47-506.
[10]中国石油天然气总公司地球物理勘探局.地震储层横向预测技术与实例[M].北京:石油工业出版社,1992:1-308.
[11]俞寿朋.高分辨率地震勘探[M].北京:石油工业出版社,1993:1-189.
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