川西致密碎屑岩测井评价技术综合研究

川西地区天然气储层主要集中在浅中层及深层的致密碎屑岩储层中一对于浅中层近常规一致密储层，主要利用常规测井信息开展评价，建立了多参数判别、视地层水电阻率含气性识别、基于中子挖掘效应含气性识别等储层评价技术；对于深层须家河组致密一超致密储层，依据成像、核磁、偶极声波测井资料，建立了裂缝识别与有效性评价、核磁测井储层评价、纵横波速度比等储层评价技术，评价的关键在于裂缝识别与有效性评价，流体识别最有效的手段是基于核磁测井含气性综合识别。通过方法技术适应性分析，认为特殊测井在浅中层测井储层评价中必要性不强，但在深层却必不可少。指出了日前的技术缺陷及下步研究方向，对浅中层应加强不同地区与层位的针对性研究，深层应加强核磁测井评价技术研究。

Logging Evaluation Technique for Compact Clastic Rocks in West Sichuan

Natural gas reservoirs were distributed in compact clastic rocks of shallow, median and deeper layers in West Sichuan. For the hallow - median and near conventional reservoirs, the conventional logging data were used for evaluation, the techniques for reservoir evaluation were established for multi-parameter appraisal, apparent formation -water resistivity, and method based on "neutron dig" ffect. For the compact-hyper-compact deeper reservoirs in Xujiahe Are-a,the techniques of fracture recognition, fracture effective evaluation and reservoir evaluation were also built on the basis of formation micro imaging logging, nuclear magnetic logging, and dipole acoustic logging. The key of reservoir e-valuation is the fracture recognition and the evaluation of fracture effectiveness. The nuclear magnetic logging is an effective method of identifying fluid types. According to application analysis, it is considered that special well logging is not necessary for evaluating the hallow-median reservoirs, but it is necessary to evaluate the deeper reservoirs. The shortage of technique for evaluation of the reservoirs and research direction are pointed out. For the hallow-median reservoirs in different areas and horizons the evaluating methods should be mainly researched. And for the deeper reservoirs, the research on the evaluation of reservoirs should be emphasized by using nuclear magnetic logging.