CAJ | 학술논문

对渤海湾盆地冀中坳陷廊固凹陷河西务构造带潜山储集层的岩心及地面露头进行了综合研究.潜山储集层的岩性主要是碳酸盐岩,储集空间包括溶孔、溶洞、裂缝和基岩微观孔隙,形成孔-洞型、裂缝型、缝-洞型和孔-洞-缝复合型的碳酸盐岩储集层.区内多期次的古岩溶作用是储集层形成的重要因素之一,古岩溶作用主要发生于沿潜山不整合面的风化淋滤带、水平潜流带、断层裂隙带及顺层层面,形成相应的溶蚀孔洞型储集层.由构造运动所形成的裂缝不仅增加了储集层的孔隙度,还极大地改善了孔洞的连通性,提高了储集层的渗透性能.但不同岩性、不同构造部位储集层的发育程度不同:白云岩类储集层好于灰岩类储集层,无石炭-二叠系覆盖区的储集层好于有石炭-二叠系覆盖区,断层发育区内储集层好干断层不发育区.河西务构造带西南端潜山储集层发育,是有利的油气勘探区块.图4表4参14
대발해만분지기중요함랑고요함하서무구조대잠산저집층적암심급지면로두진행료종합연구.잠산저집층적암성주요시탄산염암,저집공간포괄용공、용동、렬봉화기암미관공극,형성공-동형、렬봉형、봉-동형화공-동-봉복합형적탄산염암저집층.구내다기차적고암용작용시저집층형성적중요인소지일,고암용작용주요발생우연잠산불정합면적풍화림려대、수평잠류대、단층렬극대급순층층면,형성상응적용식공동형저집층.유구조운동소형성적렬봉불부증가료저집층적공극도,환겁대지개선료공동적련통성,제고료저집층적삼투성능.단불동암성、불동구조부위저집층적발육정도불동:백운암류저집층호우회암류저집층,무석탄-이첩계복개구적저집층호우유석탄-이첩계복개구,단층발육구내저집층호간단층불발육구.하서무구조대서남단잠산저집층발육,시유리적유기감탐구괴.도4표4삼14
The buried hill reservoirs of the Hexiwu structure belt in Langgu Sag, Bohaiwan Basin are comprehensively studied by core and outcrop observation. The reservoir lithology is dominantly carbonate rock, and the reservoir spaces include dissolution pores, dissolution cavities, cracks and bedrock micropores, forming pore-cavity type, crack type, crack-cavity type and combination pore-cavity-crack type reservoirs. Multiple-phase fossil karstification is an important factor during reservoir formation. The fossil karst is developed in the leached belt, submerged current belt, fracture belt and bedding direction along buried hill unconformities. The cracks formed by tectonic movement increase porosity, improve connection of pores and cavities and permeability. The reservoirs developed in different lithologies and tectonic positions have different physical properties: dolomite reservoir is better than carbonate reservoir, and reservoir not overlapped by Permo-Carboniferous stratum is better than that overlapped by Permo-Carboniferous stratum, and reservoir in the fault-developed area is better than that in the non-fault-developed area. The buried hill reservoirs in the southwestern Hexiwu structure belt are well developed and are favorable areas for oil and gas exploration.