4 609 TST + HST 1. 1 KT I MKT 4 KT I KT I KT I KT I M MKT KT I 1 KT I MKT KT I KT I SSQ2 13

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1 ACTA SEDIMENTOLOGICA SINICA Vol. 31 No. 4 Aug M KT I KT I M KT I huyuank2006@ 163. com P TE A ~ km 2 M 3 7 M T M D

2 4 609 TST + HST 1. 1 KT I MKT 4 KT I KT I KT I KT I M MKT KT I 1 KT I MKT KT I KT I SSQ2 13

3 GR SSQ1 SSQ3 GR Fig. 1 1 M C1 High-frequency sequence feature of C1well in M block of Pre-Caspian basin

4 4 611 Fig. 2 2 M KT I MKT Seismic profile interpretation of KT-I and MKT member in M block Fig. 3 3 M KT I Comparison profile of high-frequency sequence from platform to basin in M block

5 SSB2 SSB3 SSB4 2 4c S8 S9 1 4e 高位体系域 6 GR d 2 4f 4 a ~ d KT I SSQ1 SSQ3 d ~ f KT I SSQ 低位体系域 2 4a ~ b 高频旋回对岩溶储层的控制作用 14 C 海进体系域 T KT I 1

6 高频旋回对生物礁滩储层的控制作用 2 4 M 3 Schlager 1992 Fig. 4 The system tract model of high-frequency sequence on rapid transgression and slow transgression condition in M block 高频旋回对碎屑岩储层的控制作用 KT I SSQ2 S MKT KT I KT I 1

7 Fig. 5 5 Developmental model of carbonate reservoir in high-frequency sequence M. 3 J fabric features of facies-succession J Beijing Petrole- 4 implication in petroleum exploration J Development Wu Yinye. Principle of Sequence Stratigraphy M um Industry Press References 1 Schlager W Camber O. Submarine slope angles drowning unconformities and self erosion of limestone escarpments J. Geology J Fan Tailiang Yu Bingsong Gao Zhiqian. Characteristics of carbonate sequence stratigraphy and its control on oil-gas in Tarim Basin J. Geoscience Mei Mingxiang. Cycle and Sequence of Carbonate Rock M. Guiyang Guizhou Science and Technology Press Mei Mingxiang Xu Debin Zhou Hongrui. Genetic types of meter-scale cyclic sequences and their. Acta Sedimentologica Sinica 7. J Li Qun Wang Yingmin Qiu Yigang et al. Division of system tract of different sequence units and its. Petroleum Exploration and. M O. Catuneanu ed translated by 9 Bosellini A Morsilli M. A Lower Cretaceous drowning unconformity on the eastern flank of the Apulia Platform Gargano Promontory southern Italy J. Cretaceous Research M Cai Xiyuan Li Sitian. High Resolution Sequence Stratigraphy of Continental Basins M. Beijing Geological Publishing 2 Schlager W. Drowning unconformities on carbonate platforms J. House SEPM Special Publication J Yi Haisheng. Application M Ma Yongsheng Liu Bo Mei Mingxiang. Carbonate Sequence Stratigraphy Recent Progress and Application M. Beijing Ocean Press of well log cycle analysis in studies of sequence stratigraphy of carbonate rocks J. Journal of Palaeogeography Xavier Janson Charles Kerans Robert Loucks et al. Seismic archi-

8 4 615 tecture of a Lower Cretaceous platform-to-slope system Santa Agueda and Poza Rica fields Mexico J. AAPG Bulletin Tao Shizhen. Main controlling facters of large and middle lithologic stratigraphic oil and gas fields in marine carbonate J. Chinese Sci ence Bulletin suppl J Mei Mingxiang. The third-order carbonate cyclic sequences of drowned uncon- 834 Zhao Zhongping Mou Xiaoqing Chen Li. Analysis on main dia- J formity type with discussions on condensation of carbonate platforms geneses and controlling factors of Carboniferous carbonate reservoirs in J. Sedimentary Facies and Palaeogeography J J Liu Zhongbao Yu Bingsong Li Tingyan et al. Sequence development controls on iyngenesis Karst of the Middle-upper Ordovician Carbonate in Tazhong Area Tarim Basin J. Acta Sedimentologica Sinica the eastern margin of Pre-Caspian Basin J. Geoscience Xu Hong Lu Yongchao Shi Hesheng et al. High-precision organic reef sequence stratigraphy of Beikang Basin and sequence evolution model of Neogene organic reefs in Nansha Islands Sea Area J. Journal of Tropical Oceanography J I Zou Caineng Features and Petroleum Exploration Significance of High-Frequency Sequence in Pre-Caspian Basin A Case from Carboniferous KT-I Member in M Block HU Yuan 1 2 CHEN Kai-yuan 1 2 LI Yu-hai 3 LIU Shuang-shuang 1 2 GUO Xiao-chen School of Energy China University of Geosciences Beijing Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism Ministry of Education Beijing Abstract KT-I is one of the most important oil bearing series in M block of Pre-Caspian basin. The reservoir spreading is not clear understanding with varied types of facies belts severe heterogeneity and limestone interbedded with mudstone. In terms of high-frequency sequence stratigraphy the feasibility and thought of tract system division in high-frequency sequence and super sequence is put forward. And the drowning unconformity plays an important part as carbonate sequence boundary. On this basis by the recognition of sequence boundary such as drowning unconformity and exposed punctuated surface KT-I member has been for the first time divided into 3 fourth level sequence and 9 fifth level sequence and the system tract of high-frequency sequence has also been done. The system tract model of high-frequency sequence on rapid transgression equivalent to drowning unconformity and slow transgression condition has been established. Then the developing features of strata and the reservoir spreading in study area have been clear. The application of drowning unconformity and the system tracts of high-frequency sequence in carbonate petroleum exploration has been summarized at last. Key words Pre-Caspian basin carbonate rock drowning unconformity high-frequency sequence reservoir facies belts analysis

( 1) ; 6 5 [ 3 ] S1 S2 1 Fig. 1 Seismic sequence prof ile framework of Wuliyasitai Sag S1 () ( 2) S2 ( ) Ο 2 S1 Fig. 2 Sedimentary fa

( 1) ; 6 5 [ 3 ] S1 S2 1 Fig. 1 Seismic sequence prof ile framework of Wuliyasitai Sag S1 () ( 2) S2 ( ) Ο 2 S1 Fig. 2 Sedimentary fa 27 3 2006 5 ACTA PETROL EI SIN ICA Vol. 27 No. 3 May 2006 : 0253Ο2697 (2006) 03Ο0027Ο05 1 2 2 2 (11 610059 ; 21 062552) : 2 ; : ; ;; ;; : TE1111 3 : A Forming pattern and distribution features of hydrocarbon