陈中红等。陆相断陷咸化湖盆地层水化学场响应及与油气聚集关系 ——以渤海湾盆地东营凹陷为例。 地质科学 ,2010, 45(2):476-489. 摘 要 东营凹陷古近系水化学场分布与湖盆演化有着良好的对应关系，矿化度从深到浅逐渐降低，体现出沉积环境开放性的增强。 剖面上可以划分为四种水文环境：强开放性水文流畅带（地表到 1.1 km ）、弱开放性水文流畅带（ 1.1 ～ 2.0 km ）、水文阻滞过渡带（ 2.0 ～ 2.5 km ）和封闭性水文迟缓带（ 2.5 km 以下），水化学场剖面的分带性与压力场分布有着良好的对应关系。 高矿化度分布是咸化湖盆重要特征，盐岩溶解、扩散、运移和断裂沟通是其主要成因。 在这种高矿化度地层水化学场中主要发育 CaCl 2 型水，在盆地边缘低矿化度地层水中，以 NaHCO 3 水型为主，同时发育有少量低－较高矿化度的 Na 2 SO 4 水型和 MgCl 2 水型。研究结果表明，在东营凹陷断陷咸化湖盆中，含 NaHCO 3 水型的地层环境更能代表地层水交替强烈的开放性沉积环境，而 Na 2 SO 4 水型分布多与硫酸盐有关；在断陷咸化湖盆中，油气藏分布具有广泛性，油气藏不仅仅存在于高矿化度的地层水环境中，在具低矿化度的各类地层水环境中也分布有油气藏。 关键词 地层水化学场 矿化度 油气成藏 断陷湖盆 东营凹陷 Chen Zhonghong, et al. Response of Formation Water Chemical fields and Its Relation to the hydrocarbon Accumulation in the saline Faulted-basin. Chinee Journal of Geology, 2010, 45(2):476-489. The formation water chemical characteristics in the Eogene System had good response to the sedimentary conditions and its evolution in Dongying sag. The content of total salinity and chloride ion decreased from the deep depth to the lower, which was good response to the evolution of the Dongying sag from salted basin to fresh water basin. According to the vertica1 characteristics of the formation water four hydrological environments can be classified: stronger formation water frequency alternation belt(0~1.1km), feeble formation water frequency alternation belt(1.1~2.0km), formation water alternate blocking belt (2.0~2.5km) and formation water alternate tardy belt (2.5km), in every belt the total salinity, ions and ion composition ratio had different responses, and the belts corresponded to the distribution of formation pressure. High salinity displayed the main characteristics of the saline lake-basin, and dissolution of salt rock, diffusion and migration of formation water, and the communication by faults were main reasons. In the formation water with high salinity, there mainly developed CaCl 2 water type, and in the formation water with low salinity, there mainly developed NaHCO 3 water type, and the NaHCO 3 water type was substituted by the CaCl 2 water type with the content of total salinity increased. There were also developed some Na 2 SO 4 and MgCl 2 water types with low~higher salinity. The study demonstrated that, In the saline faulted lake-basin of Dongying basin, NaHCO 3 water type can representative the openly sedimentary conditions with strong alternation of formation water, and Na 2 SO 4 was relative to the distribution of sulphate; and some oil reservoirs were found in every condition with low salinity although most oil reservoirs formed in the formation water conditions with high salinity, which displayed the unique relation of formation water chemical field in salted basin with hydrocarbon accumulation . Key words: formation water chemical field, oil accumulation, salinity, faulted basin, Dongying sag
详文请见：J. Lake Sci.(湖泊科学), 2008, 20(6): 705-714 http://www.jlakes.org . 东营凹陷古近系古湖盆演化与水化学场响应 陈中红 , 查 明 , 刘太勋 ( 中国石油大学 ( 华东 ) 地球资源与信息学院 , 东营 257061) 东营凹陷古近系水化学场分布与湖盆演化有着良好的对应关系 , 以 CaCl 2 水型为主的高矿化度地层水是东营凹陷古近系咸化湖盆的典型响应特征 , 矿化度从深到逐渐降低 , 体现出从咸化湖盆向微咸化湖盆及淡水湖盆演化的地球化学响应 . 剖面上可以划分为四种水文环境 : 强开放性水文流畅带 ( 地表到 1.1km) 、弱开放性水文流畅带 (1.1-2.0km) 、水文阻滞过渡带 (2.0-2.5km) 和封闭性水文迟缓带 (2.5km 以下 ), 水化学剖面的分带性与压力分布有着良好的对应关系 . 东营凹陷古近系水化学场经历了早期的沉积与淋滤的交替和新生代的埋藏封闭作用期 , 其中在东营运动时期古近系水化学场表现最为活跃 , 是深层卤水咸化地表浅层淡水从而使浅层出现高矿化度地层水的关键作用期 , 断裂的沟通起了重要作用 , 显示出断陷湖盆的典型特征 . 关键词 : 地层水化学场 ; 矿化度 ; 油气成藏 ; 断陷湖盆 ; 东营凹陷 Response and evolution of formation water chemical fields of the paleogene in Dongying sag CHEN Zhonghong, ZHA Ming LIU Taixun ( College of Georesources and Information , China University of Petroleum , Dongying 257061, P.R.China ) Abstract: The formation of water chemical characteristics in the Paleogene System had good response to the sedimentary conditions and its evolution in Dongying sag. The type of CaCl 2 formation water with high salinity was representative response of the brine lake of the Paleogene System in Dongying sag. The content of total salinity and chloride ion decreased from the deep depth to the lower, which was good response to the evolution of the Dongying sag from salted basin to freshwater basin. According to the vertica1 characteristics of the underground water formation, four hydrological environments can be classified: stronger formation water frequency alternation belt(0-1.1km), feeble formation water frequency alternation belt(1.1-2.0km), formation water alternate blocking belt (2.0-2.5km) and formation water alternate tardy belt (2.5km). In every belt the total salinity, ions and ion composition ratio had different responses, and the belts corresponded to the distribution of formation pressure. The formation water chemical field experienced deposition and leaching in early time and burial in later time. In the period of Dongying Movement the formation water chemical field was active, and salted water from the Member 4 of Shahejie Formation migrated to the lower, and in the course the faults played important roles, which demonstrated the representative characteristics of faulted basin. Keywords: Formation water chemical field; oil accumulation; salinity; faulted basin; Dongying sag Chen Zhonghong, et al. Response and evolution of formation water chemical fields of the paleogene in Dongying sag. Journal of Lake Sciences . 2008, 20(6): 705-714 (in Chinese)
标签: 地层水
