基于测井新技术解释有效裂缝发育规律

成像测井资料提供了井下裂缝的准确分布状态,可以准确提取裂缝的参数,包括裂缝的倾角、倾向,裂缝的组合特征,这些参数为地质分析提供了极为有价值的信息.将多井的成像资料分析的结果,结合取芯岩芯分析,运用地质规律对地质特征相似的邻区进行了裂缝预测.利用四川某地区下三叠统飞仙关组储层10口井的成像和岩芯资料,通过分析裂缝的分布特征和影响裂缝发育的岩石特性、裂缝的溶蚀和充填情况、裂缝与现代地应力和构造的关系,解释出了3个有效裂缝发育带、5个有效裂缝欠发育带和2个裂缝不发育带.该结果得到了实钻资料的证实,表明综合测井新技术解释有效裂缝发育规律是可行的.

INTERPRET THE LAW OF EFFECTIVE FRACTURE DEVELOPMENT BASED ON NEW TECHNOLOGY IN WELL LOGGING

Image logging data provide the precise distribution information of fractures underground, with the data, the fracture parameters, including dip, azimuth and the combination types can be fully gained, which give valuable information for geologic analysis. the fractures in neighbor fields with similar geologic feature can be predicted based on multi well image logging data combining core data. At last, 3 effective fracture developing zones, 5 poor developing fracture zones and 2 non-fracture zones in lower Triassic Feixianguan Formation reservoir in Sichuan basin have been interpreted by studying the fracture distribution and fracture effect factors which are lithologic characters, fracture dissolution & infilling, and the relationship of fracture with present terrestrial stress and structure with 10 wells image logging data and core data. The result is confirmed by well drilling and the interpretation with thenew technology is feasible.