In order to study the geochemical characteristics, origin and its hydrocarbon potential of the Upper Cretaceous marine source rocks in the Rio Muni Basin, Equatorial Guinea, 62 debris samples of the Anduak-1 well in the Rio Muni Basin were collected to Rock-Eval pyrolysis, whole rock organic petrology analysis. This study revealed that the OM in the upper Cretaceous source rock is early mature - mature, with moderate abundance and fair quality (mainly type II and III). The organic matter has a mixed marine–terrestrial origin and deposited in the marine environment, the plant debris were probably suffered from a long-distance transportation via fluvial or else forces. The main hydrocarbon generation phase of the type III kerogen was more duration than type II, initial hydrocarbon generation was earlier, and ending hydrocarbon generation time was late. Comprehensive studies demonstrated that it has a good hydrocarbon potential to the upper Cretaceous marine shale, and is an unneglectable hydrocarbon source rock.

According to the characteristics,origin,source and distribution,the crude oil of the Albian Sendji Formation of deepwater area in the northwest Lower Congo Basin is generally light crude oil based on the study of the physical parameters,stable carbon isotope and biomarker compounds of 15 crude oil samples from 7 wells in the area.It reveals that the crude oil of the Sendji Formation in the 3 oilfields on the landward is characterized by lacustrine crude oil,which is derived from the lacustrine hydrocarbon source rock of the subsalt lake.However,the crude oil from the Sendji Formation of the MOHO oilfield in the ultra deepwater area on the seaward area,shows characteristics of marine crude oil,possibly resulted from the marine source rocks of Likouala Formation.Generally,lacustrine oil is mainly distributed in the landward side of the shallow water and part of the deep water area,marine crude oil is mainly distributed in seaward side of deepwater and ultra deepwater,and the mixed oil with lacustrine and marine facies is in the middle transitional zone.

The characteristic of petroleum in the deepwater area of Lower Conga Basin is marine,so that the marine source rock above the salt is a concern.According to the geochemical analysis data and geological information of marine source rock in Lower Congo Basin,the geochemical characteristics, hydrocarbon potential, origin and genetic types for the four sets of marine source rocks were comprehensively discussed,and the main controlling factors for the different genetic types of marine source rocks were analyzed.The results show that the marine source rocks develop above the salt rock of Lower Congo Basin,and the abundances of organic matters of them are moderate-good with typesⅡand Ⅲof kerogens,and the source rocks are consist primarily of the marine endogenous type and marine mixed type;marine source rocks in Lower Congo Basin enter the oil-generating window at the depth of about 3 500 m,and mature marine source rocks are important sources of petroleum in the deepwater area of Lower Congo Basin;because of the ascending current,anoxic environments (oceanic anoxic events), palae-fluvial action and the shift relationship between the geologic agents of ocean and river, the sedimentary environments in Lower Congo Basin change from the gulf to the open ocean strengthened gradually by fluvial action, and organic matter inputs vary gradually from marine-dominated to terrigenous-dominated from Late Cretaceous to Miocene;the changes of relative marine-terrigenous organic matter input and ocean sedimentary environment fundamentally determine the characteristics of marine source rocks.

尼日尔三角洲盆地超深水区M区块3口钻井的原油物性和地球化学特征研究表明,该盆地超深水区具有正常原油和经历了生物降解的重质原油2种类型,原油可能来源于以海洋有机质输入为主、沉积于还原-弱氧化条件下的上白垩统-古新统海相烃源岩.根据尼日尔三角洲全盆地137个原油样品的地球化学综合分析结果,基于生源输入和沉积环境参数指标的差异性,重新将尼日尔三角洲盆地的原油族群划分为3类:陆源原油、海相原油和混合生源原油,并指出了各族群原油的分布和来源.

里奥穆尼盆地油气勘探目前处于低勘探程度,盆地主力烃源岩主要是Aptian Albian阶富有机质泥页岩和泥灰岩.然而,新区新钻井揭示上白垩统发育厚层灰色 灰黑色泥页岩,却从未引起足够关注.经详细的地球化学研究表明,该套泥页岩具有中等有机质丰度(TOC值为0.6％～2.24％,平均为1.03％),干酪根类型主要为Ⅱ型,其次是Ⅲ型,处于早成熟 成熟阶段;虽然显微组分证实存在明显的陆源有机质输入,然而干酪根类型却以Ⅱ2型为主,这可能是由于河流远距离搬运来的陆源有机质与海洋原地有机质混合,在搬运和沉积过程中遭受较强烈微生物改造,并且在海洋底层缺氧水体中,分散在矿物基质中得以保存,既有明显的倾油性,又有倾气性.通过盆地模拟表明,上白垩统Turonian阶海相烃源岩在始新世进入生油窗,至今仍处于主生烃期,该套烃源岩可能在向西斜坡凹陷区已经生成油气并聚集成藏.因此,上白垩统海相泥页岩是一套具有一定生烃潜力的烃源岩,特别是厚度较大的Turonian阶泥页岩是里奥穆尼盆地不可忽视的海相烃源岩.

New PNP ligands were synthesized and characterized by means of 1H NMR,EI-MS and CHN elemental analysis.The ethylene oligomerization over the catalyst system of PNP ligand,Cr(acac)3 and MAO was carried out to investigate the performance of the catalyst system,in which Cr(acac)3 was used as main catalyst and MAO as cocatalyst.The results indicated that the substitution on N of PNP ligand and the reaction conditions made a strong impact on catalytic capability of the catalyst system and the distribution of α-olefins,the oligomerized products.The highest activity of this catalyst system was 5.6×106 g/(mol Cr·h)) and the selectivity of octene-1 was up to 64.6%.