新型钻井液气测录井系统的设计开发

The development of a new drilling liquid-gas logging system

针对目前传统的钻井液气测录井存在脱气不定量和分析成分少的问题,开发了新型钻井液油气分离及在线分析系统。该系统脱气部分利用半透膜分离原理,能针对性地脱出烃类气体,设计制造的脱气器可直接插入钻井液中提取分析成分,并通过专门建立的试验环境,试验获取了脱气器的动态衰减特性和膜两侧体积分数关联系数;系统的分析部分采用三模块设计,重新规划了分析单元的流程,扩展了在线分析的组分范围,可在线分析钻井液中油气成分。新型钻井液油气分析系统可提升钻井液气测录井水平,提高油气评价准确性,有助于弱油气储层的发现。目前该系统整体运行正常,试验效果达到预期要求。

In light of non-quantitative degasification and few components for analysis in current traditional drilling liquid-gas logging, a new type of drilling fluid oil-gas separation and online analysis system was developed. The system adopts the semi-permeable membrane separation principle to make a pertinent degasification of hydrocarbon gases. The degasser designed and produced can be inserted directly into drilling fluid to extract the analysis component. The experiment has obtained the dynamic attenuation characteristics of the degasser and the volume fraction correlation coefficient on both sides of the membrane through the specially established experimental environment. The analysis component of the system is designed as three modules. The analysis unit procedure has been re-arranged. The scope of component parts of online analysis has been expanded. The online analysis of oil-gas components in drilling fluid can be conducted. The new system can raise the level of drilling liquid-gas logging and improve the assessment exactness of oil and gas. It can facilitate the discovery of oil-gas reservoirs. The whole system currently runs properly and the experimental effect reaches the expected requirement.