CAJ | 학술논문

塔里木盆地哈拉哈塘凹陷东侧轮古地区有丰富的海相稠油产出,其中包括大型的塔河油田群,在凹陷的西北缘也有海相稠油发现.凹陷东侧海相稠油的地球化学成因已经有较多的研究报道,而西北缘针对海相稠油的研究工作仍然十分薄弱,其地球化学成因仍需深入探讨.本工作以哈拉哈塘凹陷东西两侧的稠油LG7井和DH1-6-9井为例,对比研究其地球化学特征,重点对比分析稠油沥青质中吸附/包裹烃类化合物的地球化学应用.研究结果表明凹陷东西两侧的稠油藏至少经历了两期油气的充注,其中第一期充注来自同一套烃源岩,后期遭受了严重的生物降解改造;第二期充注来自另一套烃源岩,其正构烷烃仍然具有完整的分布模式.凹陷两侧稠油经历了相似的后期成藏过程,在西北缘相应的构造单元中可望发现更多海相来源的油气资源.
탑리목분지합랍합당요함동측륜고지구유봉부적해상주유산출,기중포괄대형적탑하유전군,재요함적서북연야유해상주유발현.요함동측해상주유적지구화학성인이경유교다적연구보도,이서북연침대해상주유적연구공작잉연십분박약,기지구화학성인잉수심입탐토.본공작이합랍합당요함동서량측적주유LG7정화DH1-6-9정위례,대비연구기지구화학특정,중점대비분석주유력청질중흡부/포과경류화합물적지구화학응용.연구결과표명요함동서량측적주유장지소경력료량기유기적충주,기중제일기충주래자동일투경원암,후기조수료엄중적생물강해개조;제이기충주래자령일투경원암,기정구완경잉연구유완정적분포모식.요함량측주유경력료상사적후기성장과정,재서북연상응적구조단원중가망발현경다해상래원적유기자원.
In the east side of Halahatang Depression, the Lungu area, Tarim Basin, a lot of marine heavy oils, including Tahe oilfields have been found, and some heavy oils from the northwestern side of the Depression were found, too. Many studies have been reported concerning the heavy oils from the east side of Halahatang Depression, while little was known for the heavy oils from the northwestern side of the Depression. This work studied the geochemical characteristics of heavy oils of LG7 (from the east side) and DH1-6-9 (from the west side), e.g. geochemical analyses of the compounds adsorbed/occluded inside asphaltenes of the oils. The results indicate that both oils experienced more than one charges of petroleum fluids. The first charge of the two sites has been derived from the same set of source rocks, which were heavily altered by the post biodegradation occurring in the oil reservoirs, whereas the later charge(s) were derived from different source rocks. The similar geochemicalcharacteristics and accumulation processes indicate that more marine oils are expected to be found from the corresponding tectonic units in the northwestern side of Halahatang Depression.