中文摘要：

应用沉积学理论，通过岩心观察、室内薄片研究及扫描电镜、阴极发光等测试分析，对鄂尔多斯盆地靖边气田北部地区奥陶系马家沟组马五4-1段碳酸盐岩的成岩作用进行了较详细的研究，认为该区对储层发育有利的建设性成岩作用类型有自云石化作用、溶蚀作用、去膏化作用；破坏性作用有重结晶作用、压实压溶作用、去白云石化作用。喀斯特作用形成最重要的孔隙网络系统，经埋藏期溶蚀作用改造构成良好储层。根据成岩作用特征以及区域构造演化，总结出成岩演化序次，并将本区分成3个成岩相4个成岩亚相。油气勘探有利区为去膏化泥微晶白云岩相区，去膏化-去白云石化含灰（灰质）白云岩相区次之，微晶白云岩相区和喀斯特微粉晶白云岩亚相区则不利于孔隙发育。

英文摘要：

Based technology, the Maji conc agou this area; dedolomit on the observation authors study the Formation in the north that dolomitization and the other way round, ization are bad; Kar good reservoirs by modi tectonic development th ficatio stific n of of cores and slices and using sedimentary theory and SEM/CI. diagenesis of carbonate rock in Member 5-4-1 of Ordovician of the Jingbian gasfield of Ordos basin. The authors reach a corrosln recrysta , as we llization ation makes the 11 as degypsification are favorable to reservoirs of and compaction-pressolution, accompanied most important hole-network system, which burial corrosion. According e diagenesis character e authors generalize the diagenesis stage and divide the diagenesis into 3 diagenetic facies and 4 diagenetic parfacies. The degypsumization micritic facies is better than the degysumization-dedolomitisation calcite dolomite exploration, the micritic dolomite diagenetic facies and the karst micritic dolomite are not favorable for the development of holes.