The storm deposition types within the Dabeiwang area of Xuzhou City, Jiangsu Province, China, showcase a wide range of diversity and distinctly apparent characteristics. Based on measured sections and thin-section observations, we have studied the typical characteristics of storm deposition in this area, divided the sedimentary sequence, and summarized a comprehensive model of storm deposition. Various rock types such as thick-bedded dolomitic limestone, oolitic limestone, and calcirudite are developed in the study area. The calcirudite exhibits bamboo leaf-like morphology and various distribution forms. Typical storm sedimentary structures such as scour surfaces and mound cross-bedding were identified in the study area. Based on the distance of the gravel layer from the storm center and the depositional environment, the storm sedimentary sequence in the study area can be divided into allopatric-proximal-lagoon facies storm deposit, allopatric-distal-oolitic shoal facies storm deposit, autochthonous-supratidal facies storm deposit, allopatric-distal-interbeach marine storm deposit, sub-allopatric-tide zone facies storm deposit, and autochthonous-tide zone facies storm deposit. We summarize the comprehensive model of Cambrian storm deposition in the Dabeiwang area of Xuzhou, which has enriched the research results of Cambrian storm deposition in Xuzhou and provides support for the construction of a lithofacies paleogeographic pattern.

The eastern Ordos Basin holds substantial natural gas resources, yet its development performance varies considerably across different areas, and the underlying causes merit close attention. Taking the Mizhi–Qingjian Block as a case study, this paper integrated petrophysical tests, well-logging interpretation, and volumetric resource estimation to characterize the development of TSM (tight sandstone methane) and deep CBM (coalbed methane) reservoirs in the BX Fm (Benxi Formation) to H₈ Mb (He 8 Member) interval. The results indicate that the H₈ Mb effective sandstones exhibit the best reservoir development. The No. 8 coal seam is markedly thicker than the No. 5 coal seam. Water-bearing zones are extensively distributed in the Qingjian Block. Resource potential assessment shows that the TSM resources in the BX Fm–H₈ Mb interval total 1962.72 × 10⁸ m³, of which Class I + II amount to 905.47 × 10⁸ m³. The deep CBM resources of the No. 5 and No. 8 coal seams together reach 9974.31 × 10⁸ m³, with Class I + II accounting for 5503.83 × 10⁸ m³. On this basis, a synergistic co-production technology has been developed to enable efficient and coordinated extraction of both TSM and deep CBM resources. Northern Mizhi is identified as the primary development target, while the Qingjian area requires cautious planning due to high water content.