2012 3 Mar. 2012 33 2 : 167-175 Acta Geoscientica Sinica Vol.33 No.2: 167-175 www.cagsbulletin.com www. 地球学报.com 南襄盆地泌阳凹陷深凹区核三段沉积特征及演化 摘 1), 1)*, 1), 2), 3), 3) 1) ( ), 102249; 2), 061035; 3), 473132 要 :,,, 5 6,,, -,,,,,, -,,,,,,, H38-H31 关键词 : ; ; ; ; 中图分类号 : P534.6; P588.2 文献标志码 : A doi: 10.3975/cagsb.2012.02.05 Sedimentary Characteristics and Evolution of He-3 Formation in Deep Area of Biyang Sag, Nanxiang Basin LIAO Ji-jia 1), ZHU Xiao-min 1), DONG Yan-lei 1), HU Ting-hui 2), LUO Jia-qun 3), LIU Gui-lan 3) 1) Faculty of Geosciences, China University of Petroleum, Beijing 102249; 2) No. 3 Oil Recovery Plant of Dagang Oilfield, Cangxian, Hebei 061035; 3) Exploration and Development Research Institute of Henan Petroleum Exploration Bureau, Nanyang, Henan 473132 Abstract: Based on logging and particle size analyses in combination with regional geological data, results of previous studies, core observation and seismic reflection data, the authors consider that braided river delta, near-shore subaqueous fan, slump turbidite fans and lacustrine sedimentary facies are developed in the He-3 Formation. On such a basis, five subfacies and six microfacies can be identified. The near-shore subaqueous fan is developed in southwest and southeast margin-controlling faults of the study area, braided river delta is developed in the northeast, and slump turbidite fan is developed at the semi-deep lake-deep lake area in front of braided river delta. The lithology of near-shore subaqueous fan is mainly the medium to fine gray conglomerate characterized by multiple composition, poor sorting and poor roundness. Braided river delta consists of medium-thick gray bedded conglomerate, pebbly sandstone, sandstone with parallel bedding, cross bedding and scour-and-fill structure. Vertically, braided river delta shows disconnected positive rhythm. Spontaneous potential and resistivity curves are 973 ( : 2006CB202300) ( : 2011ZX05003-004; 2011ZX05009-002-104; 2011ZX05025-005-002) : 2012-02-07; : 2012-03-21 : :,, 1983 : 102249, 18 ( ) 2009 E-mail: liaojijia198433@163.com * :,, 1960 : 102249, 18 ( ) E-mail: xmzhu@cup.edu.cn
168 bell-shaped or box-shaped. Where the sand of braided river delta front is instable, slump would occur and, at last, the slump turbidite fans would form in deep lake. The lithology of slump turbidite fans includes fine-grained sandstone, siltstone and argillaceous siltstone with positive rhythm, massive bedding, liquefied deformation bedding, wave bedding, mudstone rip-up, flute mold, furrow membrane and other structures. Electric curves show bell, box and funnel shapes. Lacustrine sedimentary facies is mainly developed in the furrow area in front of near-shore subaqueous fan and delta front. The water depth of the study area has experienced the evolution from deep to shallow and then a little deeper in H38-H31 area. Key words: Biyang sag; deep area; He-3 Formation; sedimentary facies; sedimentary characteristics,, 1000 km 2 ( 1),,,, 354, ( 2800 m), 5 mm, 106 m 3, 2530 m 3 (, 1999;, 2007;, 2010;, 2011;, 2003), (, 2011),,, (, 2004;, 2011;, 2002), 1 研究区核桃园组三段概况 - -, - : 71 100 238 45, 120 km 2 2000~3000 m,,, ( 2) 400~500 m, - 700~800 m,, - 1100~1700 m, -, 图 1 泌阳凹陷构造位置图 ( 朱筱敏等, 2011) Fig. 1 Structural location of Biyang sag (after ZHU Xiao-min et al., 2011) - line 547; - line 565; - line 419 -seismic line 547; -seismic line 565; -seismic line 419 图 2 泌阳凹陷新生代地层综合分析图 ( 朱筱敏等, 2011) Fig. 2 Stratigraphic column of the Cenozoic in Biyang sag (after ZHU Xiao-min et al., 2011)
: 169,, 8 2 沉积相类型及其特征 (, 2010;, 2009;, 2006;, 2005;, 2005;, 2004;, 1995), 17 (603.71 m) 50 242,, :, ; ; - 2.1,,, 97 86,, ( 10A),,, 5~10 cm -,,,,, ( 4), 中扇亚相 ( 10B),, ( 3A), 1.13 m, 26 cm,,, 图 3 核三段不同类型沉积微相岩心序列图 Fig. 3 Core sequence diagram of different kinds of microfacies in He-3 Formation A- 97, ; B- 86, ; C- 143, ; D- 143, A-Bi97 well, braided river channel in middle-fan of near-shore subaqueous fan; B-Bi86 well, outer fan in near-shore subaqueous fan; C-Bi143 well, subaqueous distributary channel in braided delta; D-Bi143 well, subaqueous distributary channel and interdistributary deposit in braided delta
170 图 4 近岸水下扇地震反射剖面 Fig. 4 Seismic reflection profile of near-shore subaqueous fan, ( 5A), ; 外扇亚相, ( 10C) ( 5B), ( 3B),,,,, 2.2,,,, 辫状河三角洲前缘, - ( 3C), 5~10 m, 25 m ( 5C),,,,, 3 : (1) ( 8A- ), 70%~90%,, ; (2) ( 8A- ), ( 80%), ( 图 5 不同沉积微相的测井响应 Fig. 5 Log response of different kinds of microfacies A- ( 86 ); B- ( 97 ); C- ( 267 ); D- ( 144 ); E- (B365 ); F- ( 1 ) A-braided river channel in middle-fan of near-shore subaqueous fan(bi86 well); B-outer fan in near-shore subaqueous fan(bi97 well); C-subaqueous distributary channel in braided delta(bi267 well); D-subaqueous interdistributary deposit(bi144 well); E-estuary dam in braided delta(b365 well); F-slump turbidite fan(cheng1 well)
: 171 15%), ; (3) ( 8A- ),, (, 1998),,,,,,, (, 2001) ( 10D), ( 5D),,, ( 3D),,,,, 3~6 m,, ( 5E),,,,,, :, ;, ( 6 7) 2.3 - 浅湖亚相, ( 10E), ( 8B- ),, 40% 50%, ; 50% 60%,, ( 8B- ),, 40%,,, 图 6 辫状河三角洲前缘斜交前积反射地震剖面 (line 547) Fig. 6 Seismic profile of oblique progradational reflection in delta front (line 547) 图 7 辫状河三角洲前缘叠瓦状前积反射地震剖面 (line 565) Fig. 7 Seismic profile of imbricated progradational reflection in delta front (line 565) 图 8 不同成因砂体的粒度概率图 Fig. 8 Grain size probability graph of different geneses of sand bodies A- ; B- ; C- A-subaqueous distributary channel; B-shallow lake; C-slump turbidite fans
172, (, 2005) 半深湖 - 深湖 ( 10F),, 2.4,,, ; ( 10G) ( 10H) ;, ( 9), ( 5F) ( 8C- ),,, 0 5,,, ; ( 8C- ),,, 2 3, 图 9 深凹区核三段滑塌浊积扇地震反射特征 (line 419) Fig. 9 Seismic reflection characteristics of slump turbidite fans in He-3 Formation of deep area (line 419) 图 10 不同类型的岩相及沉积构造特征 Fig. 10 Different kinds of lithofacies and sedimentary structure characteristics A- ( 86, 2199.01 m); B- ( 97, 2700.4 m); C- ( 86, 2180.6 m); D- ( 153, 2246.43 m); E- ( 270, 3421.03 m); F- ( 270, 2818.54 m); G- ( 270, 3232.06 m); H- ( 365, 2714.45 m) A-massive conglomerate from near-shore subaqueous fan(bi86 well, 2199.01 m); B-conglomerate from middle-fan channel in near-shore subaqueous fan(bi97 well, 2700.4 m); C-siltstone from outer fan in near-shore subaqueous fan(bi86 well, 2180.6 m); D-interdistributary mudstone(bi153 well, 2246.43 m); E-wave bedding from shallow lacustrine deposits(bi270 well, 3421.03 m); F-dark mudstone in deep lake(bi270 well, 2818.54 m); G-slump deformation bedding in turbidite deposits(bi270 well, 3232.06 m); H-graded bedding in turbidite deposits(bi365 well, 2714.45 m)
: 173 3 沉积相平面展布及垂向演化 - - ; -, H38-H35 ( 11),,, 30.92 km 2 H34-H33,,, H32,, ( 12), 60.63 km 2,, 188, 305 H31,,, 155-291, 349-291 H34-H31, 330, 2.88 km 2,, ( 12), 7.14 km 2 H34-H31, :,,,, 4 结论, H38 H31,, 188 305 ;, 图 11 泌阳凹陷深凹区核三段 H35 沉积相平面展布 Fig. 11 Distribution of sedimentary facies of H35 in He-3 Formation in deep area of Biyang sag 图 12 泌阳凹陷深凹区核三段 H32 沉积相平面展布 Fig. 12 Distribution of sedimentary facies of H32 in He-3 Formation in deep area of Biyang sag
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