CAJ | 학술논문

北萨哈林盆地属于中新生代弧后盆地，发育中、上中新统奥科贝凯组页岩、上中新统努托瓦组下段页岩、下中新统威宁组和中、下中新统达吉组含煤层系3套烃源岩。主力产层为中、下中新统的达吉组砂岩和上中新统努托瓦组下段砂岩。圈闭类型为背斜、复杂断背斜和断块。统计分析表明，平面上油气主要聚集在盆地东北萨哈林次盆，并且海上油气储量、油气田规模均大于陆上；垂向上油气主要分布在中新统达吉组和上中新统努托瓦组。油气成藏条件综合评价分析认为，盆地油气分布主要受构造和储层两方面因素的控制：上新世晚期形成的构造圈闭是油气聚集的主要场所，上新世晚期-全新世萨哈林褶皱幕对早期形成的圈闭起调整或破坏作用；中、下中新统达吉组和上中新统努托瓦组下段砂岩的展布控制了油气藏的纵横向分布。油气勘探结果表明，东北萨哈林次盆陆上部分勘探程度较高，海上是近几年的储量增长区，也是今后最具勘探潜力的地区，其勘探目的层主要为努托瓦组和达吉组，勘探目标主要为构造-地层型圈闭和地层型圈闭。
북살합림분지속우중신생대호후분지，발육중、상중신통오과패개조혈암、상중신통노탁와조하단혈암、하중신통위저조화중、하중신통체길조함매층계3투경원암。주력산층위중、하중신통적체길조사암화상중신통노탁와조하단사암。권폐류형위배사、복잡단배사화단괴。통계분석표명，평면상유기주요취집재분지동북살합림차분，병차해상유기저량、유기전규모균대우륙상；수향상유기주요분포재중신통체길조화상중신통노탁와조。유기성장조건종합평개분석인위，분지유기분포주요수구조화저층량방면인소적공제：상신세만기형성적구조권폐시유기취집적주요장소，상신세만기-전신세살합림습추막대조기형성적권폐기조정혹파배작용；중、하중신통체길조화상중신통노탁와조하단사암적전포공제료유기장적종횡향분포。유기감탐결과표명，동북살합림차분륙상부분감탐정도교고，해상시근궤년적저량증장구，야시금후최구감탐잠력적지구，기감탐목적층주요위노탁와조화체길조，감탐목표주요위구조-지층형권폐화지층형권폐。
Locating in the circum-Pacific fold belts of far-east in Russia, the North Sakhalin Basin is a back-arc basin developed from Mesozoic to Cenozoic. There are three sets of source rocks including shale in the Okobykay Formation of the Upper Miocene, shale in the lower Nutovo Formation of the Upper Miocene, and coal-bearing strata in the Weining Formation of the Lower Miocene and the Dagi Formation of the Lower Miocene. Its main oil production derived from the sandstones in the Dagi Formation of the Middle and Lower Miocene and the lower Nutovo Formation of the Upper Miocene. The major trap types are anticlines, complex faulted anticlines and fault blocks. Oil and gas mainly accumulated in the Sakhalin sub-basin in the northeast, with larger reserves offshore than onshore. Vertically, they were mainly found in the Dagi Formation of the Middle Miocene and the Nutovo Formation of the Upper Miocene. The comprehensive evaluation of reservoir conditions showed that the distribu-tion of oil and gas were mainly controlled by structure and reservoir development. The structural traps formed dur-ing the late Pliocene provided spaces for hydrocarbon accumulation, and the folding event which took place from the late Pliocene to Holocene functioned as adjustment and even destruction to traps. The distribution of sand-stones in the Dagi Formation of the Middle and Lower Miocene and the Nutovo Formation of the Upper Miocene controlled the plane and vertical distributions of hydrocarbon. Compared to the highly explored onshore area, the offshore area has a great potential, and the exploration targets should be focused on the structural-stratigraphic and stratigraphic traps in the Nutovo and Dagi Formations.