沥青质碳酸盐岩储集层岩石物理特征及测井评价——以四川盆地安岳气田寒武系龙王庙组为例

发布时间：2018-03-14 08:46

本文选题：四川盆地　切入点：寒武系龙王庙组　出处：《石油勘探与开发》2017年06期 　论文类型：期刊论文

【摘要】：基于沥青溶解前后岩心样品的物性、密度、纵横波时差、电阻率和核磁共振等实验,对沥青质碳酸盐岩储集层的岩石物理特征和测井响应特征进行了研究。实验表明:(1)沥青会破坏储集层的孔隙结构,导致储集层有效储集空间减小、渗透性降低;(2)随着沥青含量的增加,纵横波时差普遍减小,而密度和电阻率值则普遍增大;(3)随着沥青含量增加,纵波时差和密度变化相对较小,而横波时差和电阻率变化相对较大;(4)沥青核磁共振横向驰豫时间(T_2)普遍小于3 ms,且沥青成熟度越高,T2值越小。据此提出基于常规与特殊测井相结合的沥青质碳酸盐岩储集层的沥青含量、有效孔隙度和含水饱和度评价方法,并应用于四川盆地安岳气田80多口气井的寒武系龙王庙组碳酸盐岩储集层,划分出沥青平面富集区带,可作为气藏开发井井位部署的依据。
[Abstract]:Based on the physical properties, density, longitudinal and shear wave moveout, resistivity and nuclear magnetic resonance (NMR) of core samples before and after asphalt dissolution, The petrophysical characteristics and logging response characteristics of asphaltene carbonate reservoir are studied. The experimental results show that the asphalt will destroy the pore structure of the reservoir and reduce the effective reservoir space. With the increase of asphalt content, the longitudinal and shear wave time differences generally decrease, while the density and resistivity values generally increase with the increase of asphalt content, and the variation of longitudinal wave time difference and density is relatively small with the increase of asphalt content. The transverse relaxation time of asphalt is generally less than 3 Ms, and the higher the maturity of asphalt is, the smaller the T 2 value. Based on this, the bituminous carbonation based on the combination of conventional and special logging is proposed. Bitumen content in salt reservoir, The evaluation method of effective porosity and water saturation is applied to the carbonate reservoir of Cambrian Longwangmiao formation in more than 80 gas wells in Anyue Gas Field, Sichuan Basin.
【作者单位】：中国石油西南油气田公司勘探开发研究院;
【基金】：国家“十三五”科技重大专项“大型油气田及煤层气开发”(2016ZX05015-003,2016ZX05052-001)
【分类号】：P618.13;P631.81

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