CBM Drilling And Well Completion Technology Feasibility Study In Daqing Oilfield

Coalbed methane(CBM) is one of the most important replace resources in daqing oilf ield, but Hegang basin, Jixi basin and shout sag which rich in CBM have some prob lems such as the formation rock grinding, poor drillability, low rate of penetration, lost circulation, low production and poor economic benefits, so we need to optimize the design of drilling in daqing oilf ield.In this paper we research on the coalbed me thane drilling technology at home and abroad, cluster well drilling technology, open hole well completion technology, ultra short radius horizontal well drilling system, short radius horizontal well construction technology, ultra short radius horizontal we ll drilling technology advantage, feather of coalbed methane pinnate horizontal well characteristics, pinnate branch horizontal well drilling of coal bed methane(CBM) technical difficulties, profile optimization design, casing program design and trajectory control technology, u-shaped horizontal Wells, v-shaped horizontal Wells and the advanced drilling equipment and related technology and equipment of coalbed methane at home and abroad, laid a theoretical foundation for the drilling completion constructio n of daqing CBM.Based on the analysis of geological characteristics of Hegang basin, Jixi basin and shout sag in daqing oilfield, designing well bore structure, combination of drilling, drilling parameters and drilling equipment of Hegang basin; C luster Wells in the jixi basin and u-shaped horizontal well bore structure, well track profile, bha and drilling parameters are optimized design; Call of hailar basin and lake sag of sidetracking horizontal well and pinnate branch horizontal well bore structure, bha and drilling parameters are optimized design; At the same time complicated downhole accident prevention in drilling construction scheme in detail in this paper. Through the research has achieved the following results:1. CBM well drilling of Hegang basin,Jixi basin and Hailaer basin in the peripheral shows that,it exists some problems such as severe lost circulation,low rate of penetration and long drilling cycle.2. Put forward the well drilling and completion technology solutions about vertical wells, directional well, horizontal well and branch horizontal well side drilling in daqing oilfield.