我国在鄂尔多斯盆地东缘获得多个大型深部煤层气藏的勘探突破，然而如何有效地将储量转化为产量并实现高效开发尚不明确。

以神府南区为例，综合应用地质、测试、压裂及生产动态资料，围绕深部煤层气藏资源性和可压性，开展地质−工程双甜点评价研究。

结果表明：(1) 研究区成煤相带适宜，以三角洲沉积为主，8+9号煤层厚度大、分布稳定，热演化程度介于0.7%~1.5%，生烃条件较好；孔−裂隙系统发育，储集空间优越，为煤层气的赋存提供储了集空间；煤层顶板以封盖能力较强的泥岩为主，位于地下水滞流区，使得区内煤层气具备良好的保存条件，煤层含气性好，具有游离气与吸附气共存的特征。(2) 利用井震结合的地球物理技术刻画了煤层脆性、水平主应力差和煤层裂缝的分布特征，建立了深部煤层气地质−工程双甜点识别指标体系，划分了3类地质−工程甜点区，Ⅰ类甜点区位于东部，Ⅱ类甜点区位于中西部，Ⅲ类甜点区位于西北部。(3) 针对区内煤层埋藏深、孔渗性差、割理裂隙发育等特征，提出以“高排量大规模注入+变黏滑溜水造缝携砂+高强度加砂+全尺度裂缝支撑”为核心的体积压裂技术。压后试采评价显示Ⅰ类甜点区投产井上产快，峰值产量8 000 m³/d左右，生产稳定在7 000~8 000 m³/d。研究成果有效指导并推动了神府区块深部煤层气勘探开发有利区优选与先导试验区方案实施，对该区深部煤层气的规模建产具有积极意义。

China has made breakthroughs in the exploration of large-scale deep coalbed methane (CBM) reservoirs along the eastern margin of the Ordos Basin. However, effectively converting the reserves of these reservoirs into production and achieving their efficient exploitation remain unclear.

Based on the geological, tests, fracturing, and production performance data, this study conducted research into the assessment of geological-engineering dual sweet spots of deep CBM in the southern Shenfu block by focusing on the resource conditions and fracability of deep CBM reservoirs. [Results and Conclusions] Key findings are as follows: (1) The study area hosts suitable coal-forming facies zones dominated by deltaic sediments. In this block, the Nos. 8 and 9 coal seams exhibit substantial thicknesses, stable distributions, and thermal maturity ranging from 0.7% to 1.5%, suggesting favorable hydrocarbon generation conditions. Furthermore, both coal seams feature well-developed pore-fracture systems, providing superior reservoir space for CBM. The roofs of both coal seams, composed primarily of mudstones with a high sealing capacity, are located in groundwater stagnation zones, creating favorable conditions for CBM preservation in the southern Shenfu block. With excellent gas-bearing properties, both coal seams show the coexistence of free gas and adsorbed gas; (2) This study characterizes the distributions of the brittleness, horizontal principal stress differences, and fractures of the coal seams using geophysical techniques that integrate logs and seismic data. Based on this, it constructs an indicator system for identifying the geological-engineering dual sweet spots of deep CBM, and accordingly, identifies three types of geological-engineering dual sweet spots in the southern Shenfu block: type I located in the eastern portion, type II in the west-central portion, and type III in the northwestern portion; (3) Considering the substantial burial depths, low porosity and permeability, and well-developed cleats and fractures of coal seams in the study area, this study develops a volume fracturing technique that centers on injection of a large volume of fracturing fluids at high rates, fracturing and proppant transport via slickwater of varying viscosities, high- intensity proppant injection, and propping of fractures on various scales. As indicated by the assessment of post-fracturing production tests, wells put into production in type I sweet spots have witnessed a rapid increase in CBM production, with stable production ranging from 7000 to 8000 m³/d, peaking at approximately 8000 m³/d. The results of this study have effectively guided and advanced both the selection of the optimal areas for the exploration and production of deep CBM in the Shenfu block and the implementation of plans for pilot test areas, thereby holding positive significance for the large-scale production capacity construction of deep CBM in the block.