Theoretical understandings, key technologies and practices of tight conglomerate oilfield efficient development: A case study of the Mahu oilfield, Junggar Basin, NW China

LI Guoxin,QIN Jianhua,XIAN Chenggang,FAN Xibin,ZHANG Jing,DING Yi

Table 4 Statistics of operation parameters of various wells in pilot area of Ma131 with the small well spacing stereo development.

Platform number Well number Layer Depth/ m Horizontal segment length/m Drilling ratio/% Drilling cycle/d Fracturing stage Cluster number Cluster spacing/ m Sanding amount/ m3 Fracturing fluid volume/m3 Sanding strength/ (m3·m-1) Technology 1 M1241 T1b21 5040 1788 94.6 122 26 72 25 2125 37 113 1.22 Fast drilling bridge plug M1242 5034 1802 98.7 59 24 136 13 3275 50 815 1.85 Current limiting fracturing M1246 T1b3 5020 1802 99.5 38 33 95 20 1900 28 939 1.00 Fast drilling bridge plug M1247 5040 1803 98.6 42 29 61 29 1889 27 110 1.05 Fast drilling bridge plug 2 M1243 T1b21 5025 1802 99.9 67 29 168 11 3330 57 661 1.88 Temporary plugging fracturing M1244 5023 1782 95.6 55 29 162 11 3204 54 929 1.78 Fast drilling bridge plug M1248 T1b3 4597 1489 98.3 41 26 51 30 1770 24 020 1.18 Fast drilling bridge plug M1249 4804 1702 89.1 82 27 77 22 1670 23 986 1.02 Fast drilling bridge plug 3 M1245 T1b21 4998 1765 96.0 56 27 78 23 2196 39 137 1.23 Fast drilling bridge plug M1250 T1b3 4800 1600 97.6 46 27 77 21 2510 30 481 1.52 Fast drilling bridge plug M1251 4860 1622 94.4 39 26 75 22 2653 33 094 1.55 Fast drilling bridge plug M1252 4938 1690 99.9 99 28 80 22 1677 24 043 0.99 Fast drilling bridge plug Average 4932 1720 96.8 62 28 94 21 2350 35 944 1.35