CAJ | 학술논문

水平对接井（ SIS）由水平井与垂直井对接组成,并可根据地质条件和需要,设计成多口水平井与 1 口直井对接的多＂U＂型组合; 其井身结构简单,尤其是完井后可下入一根高强度PVC 筛管,克服因煤体坍塌、煤粉沉淀等原因可能造成的水平井段堵塞,还可对水平段井眼进行双向冲洗,保证采气阶段井眼的畅通。煤层气开发实践证明水平井可有效地导通煤储层的裂隙系统,增加气、水导流能力,大幅度提高单井产量和采收率,是开发低压、低渗地区煤层气资源的有效手段,而水平对接井以其合理的井身结构和独特的完井方式,更适宜于中国大多数煤储层条件的煤层气开发。
수평대접정 （ SIS） 유수평정여수직정대접조성,병가근거지질조건화수요,설계성다구수평정여 1 구직정대접적다 ＂U＂형조합; 기정신결구간단,우기시완정후가하입일근고강도PVC 사관,극복인매체담탑、매분침정등원인가능조성적수평정단도새,환가대수평단정안진행쌍향충세,보증채기계단정안적창통。매층기개발실천증명수평정가유효지도통매저층적렬극계통,증가기、수도류능력,대폭도제고단정산량화채수솔,시개발저압、저삼지구매층기자원적유효수단,이수평대접정이기합리적정신결구화독특적완정방식,경괄의우중국대다수매저층조건적매층기개발。
SIS consists of a horizontal well and a vertical well. Based on the requirements of the geolog- ical conditions and requirements, the author may design the well grouping as a ＂U＂ type assembly, con- sisting of a multiple of horizontal wells and a vertical well. The structure of wellbore is simple. Especially after well completion a high strength perforated PVC pipe can be lowered into the well to prevent the hori- zontal section from plugging due to collapsing of coal solid, or deposition of fine coal. Bidirectional flush- ing can also be carried out in the horizontal section of the borehole, so as to ensure smooth flow of gas in the production section of the borehole. Practical experiences obtained from development of CBM have proved that horizontal well can effectively connect the fracture system in coal reservoir. It can increase the diversion capacity of gas and water, and enhance to a great extent the production of a single well and re- covery rate. It is an effective means to exploit CBM resources in low pressure, low permeability areas. SIS well due to its rational wellbore structure and unique completion method is more suitable for develop- ment of CBM in most coal reservoir conditions in China.