Abstract Gas reservoirs of the Lower Triassic Feixianguan Formation in eastern Sichuan Basin are mostly dolostones，which are distributed in the platform margin around Kaijiang-Liangping Basin. Petrographic and geochemical evidences indicate multiple dolomitization events，and the most significant one of which was triggered penecontemporaneously by reflux of evaporative seawater. Dolostones formed in early periods had undergone various degree of recrystallization during burial，which resulted in the complex rock textures. Pore of the Feixianguan Formation dolostones is predominantly intergranular and/or oomoldic(or intragranular)，which is inherited from the precursor limestones rather than creating during dolomitization.These kinds of pore are well preserved in dolostones，owing to early dolomitization and the resistance of dolomites to compaction.
About author: Pan Liyin，born in 1981，received his M.S.degree from Nanjing University in 2006.Now he is an engineer of PetroChina Hangzhou Research Institute of Geology and is mainly engaged in carbonate petrography and geochemistry.图1 四川盆地东部长兴组—飞仙关组沉积相及气田位置（据张建勇等，2011，有修改） Fig.1 Sedimentary facies of the Changxing-Feixianguan Formations and location of gas fields in eastern Sichuan Basin(Modified from Zhang et al.，2011)
Cite this article:
Pan Liyin,Liu Zhanguo,Li Chang et al. Dolomitization and its relationship with reservoir development of the Lower Triassic Feixianguan Formation in eastern Sichuan Basin[J]. JOURNAL OF PALAEOGEOGRAPHY, 2012, 14(2): 176-186.
Pan Liyin,Liu Zhanguo,Li Chang et al. Dolomitization and its relationship with reservoir development of the Lower Triassic Feixianguan Formation in eastern Sichuan Basin[J]. JOPC, 2012, 14(2): 176-186.
何莹，郭旭升，张克银，等.2007.川东北飞仙关组优质储集层形成研究［J］.天然气工业，27（1）:12-16. 黄思静，卿海若，胡作维，等.2008a.川东三叠系飞仙关组碳酸盐岩的阴极发光特征与成岩作用［J］.地球科学——中国地质大学学报，33(1):26-34. 黄思静，Qing Hairuo，黄培培，等.2008b.晚二叠世—早三叠世海水的锶同位素组成与演化——基于重庆中梁山海相碳酸盐的研究结果［J］.中国科学（D辑），38（3）:273-283. 黄思静，佟宏鹏，刘丽红，等.2009.川东北飞仙关组白云岩的主要类型、地球化学特征和白云化机制［J］.岩石学报，25（10）:2363-2372. 罗平，苏立萍，罗忠.2006.激光显微取样技术在川东北飞仙关组鲕粒白云岩碳氧同位素特征研究中的应用［J］.地球化学，35（3）:325-330. 寿建峰，沈安江，李俊，等.2011.中国海相碳酸盐台地的多台槽结构与油气生储组合［J］.海相油气地质，16(3):1-7. 王恕一，蒋小琼，管宏林，等.2010.川东北普光气田鲕粒白云岩储集层粒内溶孔的成因［J］.沉积学报，28（1）:10-16. 王一，王兴志，王一刚，等.2009.川东北下三叠统飞仙关组白云岩的地球化学特征［J］.沉积学报，27（6）:1043-1049. 王一刚，张静，刘兴刚，等.2005.四川盆地东北部下三叠统飞仙关组碳酸盐蒸发台地沉积相［J］.古地理学报，7（3）:357-371. 王一刚，文应初，洪海涛，等.2007.四川盆地三叠系飞仙关组气藏储集层成岩作用研究拾零［J］.沉积学报，25（6）:831-839. 魏国齐，杨威，张林，等.2005.川东北飞仙关组鲕滩储集层白云石化成因模式［J］.天然气地球科学，16（2）:162-165. 曾德铭，王兴志，王思仪.2007.溶蚀在川东北飞仙关组储集层演化中的意义［J］.西南石油大学学报，29（1）:15-18. 曾伟，黄先平，杨雨，等.2006.川东北地区飞仙关组储集层中的埋藏溶蚀作用［J］.天然气工业，26（11）:4-6. 张建勇，周进高，郝毅，等.2011.四川盆地环开江—梁平海槽长兴组—飞仙关组沉积模式［J］.海相油气地质，16（3）:45-54. 张学丰，刘波，蔡忠贤，等.2010.白云岩化作用与碳酸盐岩储集层物性［J］.地质科技情报，29(3):79-87. 郑荣才，耿威，郑超.2008.川东北地区飞仙关组优质白云岩储集层的成因［J］.石油学报，29（6）:815-821. Duggan J P，Mountjoy E W，Stasiuk L D.2001.Fault-controlled dolomitization at Swan Hills Simonette oil field(Devonian)，deep basin west-central Alberta，Canada［J］.Sedimentology，48:301-323. Durocher S，Al-Aasm I S.1997.Dolomitization and neomorphism of Mississippian(Visean)upper Debolt Formation，Blueberry Field，northeastern British Columbia: Geologic，petrologic，and chemical evidence［J］.AAPG Bulletin，81: 954-977. Fu Q L，Qing H R，Bergman K M.2006.Early dolomitization and recrystallization of carbonate in an evaporite basin: The Middle Devonian Ratner laminite in southern Saskatchewan，Canada［J］.Journal of the Geological Society(London)，163: 937-948. Gaines A M.1977.Protodolomite redefined［J］.Journal of Sedimentary Petrology，47: 543-546. Heydari E.2000.Porosity loss，fluid flow，and mass transfer in limestone reservoirs: Application to the Upper Jurassic Smackover Formation，Mississippi［J］.AAPG Bulletin，84(1):100-118. Heydari E.2003.Meteoric versus burial control on porosity evolution of the Smackover Formation［J］.AAPG Bulletin，87(11):1179-1197. Hudson J D. 1975. Carbon isotope and limestone cement ［J］. Geology, 3(1):19-22. Jasper T. 1999. Strontium, sauerstoff und kohlenstoff: Isotopische entwicklung des Meerwassers ［D］. German: Ruhr-Universitt. Korte C，Kozur H W，Bruckschen P， et al.2003.Strontium isotope evolution of Late Permian and Triassic seawater［J］.Geochimica et Cosmochimica Acta，67: 47-62. Korte C，Kozur H W，Veizer J.2005.δ13C and δ18O values of Triassic brachiopods and carbonate rocks as proxies for coeval seawater and palaeotemperature［J］.Palaeogeography，Palaeoclimatology，Palaeoecology，226: 287-306. Ma Y，Guo X，Guo T， et al.2007.The Puguang gas field：New giant discovery in the mature Sichuan Basin，southwest China［J］.AAPG Bulletin，91(5):627-643. Martin E E, Macdougall J D. 1995. Sr and Nd isotopes at the Permian/Triassic boundary: A record of climate change［J］. Chemical Geology, 125:73-99. Mazzullo S J.1992.Geochemical and neomorphic alteration of dolomite: A review［J］.Carbonates and Evaporites，7: 21-37. Mountjoy E W，Amthor J E.1994.Has burial dolomitization come of age？Some answer from the Western Canada Sedimentary Basin［A］.In: Purser B，Tucker M，Zenger D(eds).Dolomites.A Volume in Honour of Dolomieu［C］.International Association of Sedimentologists Special Publication，21: 203-229. Qing H R，Rose E P F，Bosence W J.2001.Dolomitization by penesaline seawater in Early Jurassic peritidal platform carbonates，Gibraltar，western Mediterranean［J］.Sedimentology，48: 153-163. Reeder R J.1983.Crystal chemistry of the rhombohedra1 carbonates［A］.In: Reeder R J(ed).Carbonates: Mineralogy and Chemistry: Reviews in Mineralogy，11: 1-47. Sandberg P A.1983.An oscillating trend in Phanerozoic non-skeletal carbonate mineralogy［J］.Nature，305:19-22. Sibley D F.1991.Secular changes in the amount and texture of dolomite［J］.Geology，19(2):151-154. Sun S Q.1994.A reappraisal of dolomite abundance and occurrence in the Phanerozoic［J］.Journal of Sedimentary Research，64: 396-404. Wang Y G，Xu C C，Huang X P， et al.2008. Evidence of Deep-Water Carbonate for Kaijiang-Liangping Trough and Its Role in Giant Gas Accumulations in the Sichuan Basin，Southwest China［C］.AAPG Convention，San Antonio，TX. Zempolich W G，Baker P A.1993.Experimental and natural mimetic dolomitization of aragonite ooids［J］.Journal of Sedimentary Petrology，63(4):596-606. Zhao W，Luo P，Chen G， et al.2005.Origin and reservoir rock characteristics of dolostones in the Early Triassic Feixianguan Formation，NE Sichuan Basin，China：Significance for future gas exploration［J］.Journal of Petroleum Geology，28(1):83-100.张西娟
