摘要
吐哈盆地台北凹陷轻质油储集层常规气测录井过程中,由于油质轻烃类组分随钻井液返出井口后挥发逸散严重,所检测的钻井液中烃类组分含量失真,储集层解释评价难度大。热解气相色谱录井技术以相对能真实反映轻质油储集层烃类组分含量的岩屑或岩心样品为分析对象,可完成一般为C8—C37各个单体烃的检测和样品谱图分析,实现储集层产液性质的评价。通过对台北凹陷多个区块29口井不同轻质油储集层样品岩石热解气相色谱特征评价参数(碳数范围、主峰碳、Pr/nC17、Ph/nC18、OEP)的统计,结合不同储集层谱图特征,对照试油结果,建立了适用于该凹陷不同轻质油储集层的综合解释评价标准。实际应用表明,该方法在快速判断油层、油水同层、含油水层方面具有较高的准确性,为吐哈盆地台北凹陷储集层的录井解释评价提供了可靠手段。
During conventional gas logging for light oil reservoirs in Taibei sag,Tuha Basin,hydrocarbon components of light oil were seriously volatile and fugitive after they returned to the wellhead with drilling fluid,the content was distortion for hydrocarbon components in detected drilling fluid,it was difficult to interpret and evaluate reservoirs.Pyrolysis gas chromatography logging technology takes cuttings or core samples as the analysis object,which can truly reflect the content of hydrocarbon components of light oil reservoirs,generally complete each monomer hydrocarbon detection of C8-C37 and sample spectrum analysis and achieve the evaluation of liquid-producing nature.By making statistics of the evaluation parameters of rock pyrolysis characteristics by gas chromatography for samples of different light oil reservoirs from 29 wells in multiple blocks of Taibei sag(such as car-bon number range,prominent peak carbon,Pr/nC17,Ph/nC18 and OEP),combining with spectra characteristics of different reservoirs,comparing with oil test results,the comprehensive interpretation and evaluation criteria that were suitable for different light oil reservoirs of Taibei sag were set up.The practical application showed this method was accurate in rapidly determining oil layers,oil-water layers and oily water layers,and provided a reliable means for mud logging interpretation and evaluation of reservoirs of Taibei sag in Tuha Basin.
出处
《录井工程》
2014年第4期46-50,102-103,共5页
Mud Logging Engineering
关键词
岩石热解
气相色谱
谱图形态
特征参数
解释评价
标准
应用
rock pyrolysis,gas chromatograph,spectrum form,characteristic parameter,interpretation &evaluation,criterion,application
