31 1 2012 3 GLOBAL GEOLOGY Vol. 31 No. 1 Mar. 2012 1004 5589 2012 01 0162 09 100101 4 P618. 130. 2 P631. 8 A doi 10. 3969 /j. issn. 1004-5589. 2012. 01. 020 Characteristics of stratigraphic structure and oil-gas-water distribution by logging data in Arys oilfield DU Xu-dong ZHAO Qi-hui ZHUANG Wei HAN Gui-qin WU Guo-hai Geosciences Center CNPC Greatwall Drilling Corporation Beijing 100101 China Abstract Analyzing the stratigraphic characteristics of the Arys oilfield and South Arys structure the authors identified four marker beds based on the logging data and considered that the Akshabluk Formation was distributed in a relatively stable conditions in Cretaceous and Late Jurassic which was used detailed comparison of geological characteristics in sublayers level. Meanwhile the authors considered that the Akshabluk Formation was unconformable with its underlying Kumker Formation which should be the residual formation of Middle-Lower Jurassic. Moreover the authors analyzed the stratigraphic relation of the corresponding layers of the South Arys structure which showed that the unconformity was existed between the Akshabluk Formation and Kumker Formation indicating the fact of unconformity between the Akshabluk Formation and its underlying Jurassic strata in Arys oilfield. On the basis of the recognition of unconformable relationship the reservoirs of the Arys oilfield in Lower Jurassic were the multiple stratigraphic unconformity reservoirs in type. Present oil wells of the basement were independent reservoirs controlled by paleo-uplift. Key words Arys oilfield formation correlation well logging data unconformity oil-gas-water distribution 2011-09-19 2012-02-12 CNPC 2008E-1603
1 163 5 0 Arys - 1 2 3 4 J 1 b J 1 s J 1 a J 2 d J 2 kr 1 6 7 8 J 3 km U -1 J 3 ak U -0 U -0-0 U -0-1 U -0-2 U -0-1 3 U -0-4 5 1. 1 K 1 nc1ar 1 Table 1 1 Stratigraphic sequence in the studied area K K 1 J J 3 J 3 ak U - 0 U - 0 U - 0 J 3 km U - 1 U - 1 U - 1 J 2 + 1 J 1 b U - 1 J 2 + 1 J 1 s J 1 a J 2 + 1 c J 1 + 2 b J 2 + 1 a J 2 d J 2 kr J 2 + 1 1. 2
164 31 3 4 1 2 ~ 4 m U - 0-3 Fig. 1 1 K 1 - J Standard stratigraphic profile of J -K 1 maker bed in Arys oilfield and its near structures
1 165 5 ~ 10 m 1 1. 3 U -0 U -1 U -0 U -1 U -1 U -1 U -1 U -1 U -0 U -1 U U -Ⅰ -0-0 U -0-4 5 U -0-0 U -1 100 ~ 120 m 170 2 ~ 5 m m U -0-1 20 m 2 m U -0 U -1 U -1 AR25 AR39 U -0-2 15 ~ 20 m U -1 A14 -A6 -A7 -A45 U -0-3 2 U -1 A45 A14 U -1 U -0-4 15 ~ 29 m U -0 U -1 U -0-4 U -1 U -0 2 U -1 1 U -1 U -0-4 U -1 U -1Sand A6 1 450. 0 ~
166 31 1 478. 0 m U -1 Sand A14 3 U -1 A8 A9 U -1 U -1 15 ~ 20 U -1 U -1 A14 U -1 U U -1Sand A6 U -1 Sand -1 15 m A45 U -1 Sand U -1 100 m Fig. 2 2 A14 -A6 -A7 -A45 Standard stratigraphic profile of wells A14 - A6 -A7 -A45 in Arys oilfield 2 UAR 1 6 5 1 5 ~ 10 m
1 167 J 2 + 1 a J 1 + 2 b UAR1 2 6 J 2 + 1 c 3 J 2 + 1 c UAR1 6 J 1 + 2 b UAR6 3 UAR2 UAR3 UAR5 J 2 + 1 a 3 3 A43 -UAR5 -UAR3 -UAR2 -UAR1 -UAR6 Fig. 3 Stratigraphic correlation profile of wells A43 -UAR5 -UAR3 -UAR2 -UAR1 -UAR 6 UAR1 J 1 + 2 b UAR1 5 J 1 + 2 c UAR6 < 400 m 4 UAR1 UAR2 UAR1 UAR6 860 m 3 U -1 J 2 + 1 U -1 A43 3 J 2 + 1 a A6 A14 A6 1 440. 0 ~ 1 443. 0 m UAR5-1 348. 3 m
168 31 A14 1 428. 5 ~ 1 432. 5 m - 1 341. 4 m 4 2 U -1 A15 A14 7 U -1 A13 A16 A3-1 335. 2 m A45 U -1-1 335. 2 m 4 3 U -0 U -1 U -1 U -1 4 A14 1 428. 5 ~ 1 432. 5 m - 1 336. 9 m - 1 338. 9 m 4 Fig. 4-1 338. 9 m A15 1 506. 5 ~ 1 512. 5 m - 1 410. 6 m A6 1 485. 0 ~ 1 489. 0 m - 1 394. 3 m U -0 U -1 4 A45 1 749. 0 ~ 1 830. 0 m > 20 m 3 /d 1 825. 8 ~ 1 830. 0 m - 1 739. 2 m Reservoir model in Arys oilfield 4 A23 9 3 A41 A39 A16 5 1 6-10 4 6 9 U -1 Table 2 2 U - 1 U -1 and basement reservoir types and their water-oil-gas contact in Arys oilfield U -1 J 2 + 1 A3 A16 A13-1335. 2 m A14-1338. 9 m A15-1410. 6 m A6-1394. 3 m A45-1739. 2 m A23 A38 A21 A41 A39 A16
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