歧口凹陷滨海地区深部储集层油气录井评价方法

Oil-gas mud logging evaluation methods for deep reservoirs of Binhai Region of Qikou sag.

随着各大油田勘探开发的深入,充分认识深层油气特征并研究其解释评价方法已成为石油录井工作者的重要课题之一。针对大港油田歧口凹陷滨海地区深层油气特征,在分析录井评价深层油气所面临困难的基础上,围绕储集层气测录井的烃湿度比、烃斜率的纵向变化特征和与烃源岩的关系,研究了利用气测烃湿度比和烃斜率的纵向变化特征评价储集层是否含气的初步方法,探讨了结合储集层与烃源岩的烃湿度比和烃斜率的关系图识别油气层的问题,归纳了结合烃源岩的定量荧光录井的油性指数综合分析确定储集层流体性质的综合判断方法。该方法在大港油田歧口凹陷滨海地区BSH 22井深层油气的解释评价中效果显著,为大港油田岐口凹陷滨海地区深部储集层解释评价研究奠定了基础。

With every oilfield exploration and development going deep,fully cognizing oil-gas features of deep layers and studying their interpretation and evaluation methods has become one important task for mud logging technician.In view of deep oil-gas features of Binhai region of Qikou sag in Dagang Oilfield,on the basis of analyzing the difficulties in mud logging evaluation of deep oil and gas,the paper made a deep study of the relations among longitudinal variation features of reservoir gas logging hydrocarbon humidity ratio,hydrocarbon slope and source rock,first analyzed the preliminary method of using longitudinal variation features of gas logging hydrocarbon humidity ratio and hydrocarbon slope to evaluate whether reservoirs bearing gas or not, then discussed the problem of combining relationship charts of reservoirs and source rock's hydrocarbon humidity ratio and hydrocarbon slope to identify hydrocarbon reservoirs, lastly,summed up the comprehensive judgment methods of combining source rock oiliness index from quantitative fluorescence logging to comprehensively analyze and determine reservoir fluid properties.The applied effect of the above optimized methods in deep oil and gas interpretation & evaluation of Well BSH 22 of Binhai region of Qikou sag in Dagang Oilfield was remarkable,and laid a foundation for deep reservoir interpretation and evaluation study for Binhai Region of Qikou sag in Dagang Oilfield.