The largest Precambrian gas field (Anyue Gasfield) in China has been discovered in the central Sichuan Basin. However, the deep ancient Ediacaran dolomite presents a substantial challenge due to their tightness and heterogeneity, rather than assumed large-area stratified reservoirs controlled by mound-shoal microfacies. This complicates the characterization of “sweet spot” reservoirs crucial for efficient gas exploitation. By analyzing compiled geological, geophysical and production data, this study investigates the impact of strike-slip fault on the development and distribution of high-quality “sweet spot” (fracture-vuggy) reservoirs in the Ediacaran dolomite of the Anyue Gasfield. The dolomite matrix reservoir exhibits low porosity (less than 4%) and low permeability (less than 0.5×10^–3 μm²). Contrarily, fractures and their dissolution processes along strike-slip fault zone significantly enhance matrix permeability by more than one order of magnitude and matrix porosity by more than one time. Widespread “sweet spot” fracture-vuggy reservoirs are found along the strike-slip fault zone, formed at the end of the Ediacaran. These fractured reservoirs are controlled by the coupling mechanisms of sedimentary microfacies, fracturing and karstification. Karstification prevails at the platform margin, while both fracturing and karstification control high-quality reservoirs in the intraplatform, resulting in reservoir diversity in terms of scale, assemblage and type. The architecture of the strike-slip fault zone governed the differential distribution of fracture zones and the fault-controlled “sweet spot” reservoirs, leading to wide fractured-vuggy reservoirs across the strike-slip fault zone. In conclusion, the intracratonic weak strike-slip fault can play a crucial role in improving tight carbonate reservoir, and the strike-slip fault-related “sweet spot” reservoir emerges as a unique and promising target for the efficient development of deep hydrocarbon resources. Tailored development strategies need to be implemented for these reservoirs, considering the diverse and differential impacts exerted by strike-slip faults on the reservoirs.

四川盆地中部发现我国最大的前寒武系气田（安岳气田）。然而，深层古埃迪卡拉系白云岩由于其致密性和非均质性而面临巨大的挑战，而不是假设的受丘滩微相控制的大面积层状储层。这使得对高效天然气开采至关重要的“最佳点”储层的表征变得更加复杂。通过分析整理的地质、地球物理和生产资料，研究了走滑断裂对安岳气田埃迪卡拉系白云岩优质“甜点”（缝洞）储层发育和分布的影响。白云岩基质储集层具有低孔隙度（小于4%）、低渗透率（小于0.5×10^–3 μm²)。相反，沿走滑断裂带的裂缝及其溶蚀过程使基质渗透率显着提高一个数量级以上，基质孔隙度显着提高一倍以上。沿着埃迪卡拉纪末端形成的走滑断层带发现了广泛的“甜点”缝洞型储层。这些裂缝性储层受沉积微相、压裂与岩溶作用耦合机制控制。台缘岩溶作用盛行，而台内压裂和岩溶作用共同控制优质储层，导致储层规模、组合和类型的多样性。走滑断裂带的构造决定了断裂带的差异分布和受断裂控制的“甜点”储层，导致走滑断裂带上广泛存在缝洞型储层。综上所述，克拉通内弱走滑断裂对致密碳酸盐岩储层的改造具有重要作用，与走滑断裂相关的“甜点”储层成为深层油气资源高效开发的独特而有前景的目标。针对这些油藏，需要根据走滑断裂对油藏的多样化、差异性影响，制定针对性的开发策略。