SD油田录井、测井解释互补性研究的几点认识

Complementary interpretations of mud logging and well logging in SD Oilfield.

录井、测井解释都有各自的优势和局限性,录井是通过实物比较直接地观察地层,获取储集层油气等地质信息。测井是对岩石物理特征的测量,通过数据间接地反演推测地层油气等地质特征。二者所用的手段不同,分析的角度不同,受到的干扰因素不同,两者相互补充则能达到理论与实践的统一。原生轻质油藏,录井解释采用气测组分比值图板对测井解释进行补充与验证;次生中质-重质稠油油气藏,测井响应特征明显,录井解释可用荧光级别定性解释。对低电阻率油藏,录井用荧光级别定性解释,气测湿度比Wh辅助判断,并辅以测井物性解释。气藏可采用测井资料进行解释,再用录井气测数据加以验证。实际工作中要综合运用录井、测井信息,参考油田及地层解释规律,具体问题具体分析,才能得出近乎正确的结论。结合测井数据,各取所长,对测井、录井油气解释互补性做了定性探讨。并以SD油田为例,结合试油结论进行了实践验证。

Mud logging and well logging have their own superiorities and limitation. Mud logging directly observes strata to obtain reservoir geological information through real object contrasting. Well logging measures petrophysical characteristics,indirectly and inversely infers reservoir geological characteristics with data,they are different in using means, analyzed viewpoints and the interfered factors,and can achieve the unity of theory and practice through complementing each other.For primary light oil reservoirs, well logging interpretation adopts gas logging component ratio chart to complement and verify well logging interpretation; for secondary intermediate-heavy oil and gas reservoirs,the response characteristics for well logging are obvious,mud logging can make qualitative interpretation by using fluorescence levels. For low-resistivity oil reservoirs, mud logging uses fluorescence levels to make qualitative interpretation with auxiliary judgment of gas logging humidity ratio(Wh) as well as physical property interpretation of well logging;gas reservoirs can first adopt well logging data to carry out interpretation, then use gas logging data to verify.In actual jobs,we should make comprehensive use of mud logging and well logging,refer to oilfield and stratigraphic interpretation of the law,and conduct specific analyses to specific issues to obtain the right conclusions.Through combining with well logging data and each taking their respective merits,the qualitative study was made for oil-gas interpretation complementary between well logging and mud logging.Taking SD Oilfield as an example,the viewpoints were verified by oil test conclusions.