塔里木盆地下寒武统玉尔吐斯组烃源岩热演化模拟分析

Abstract

Abstract:

As one of the important source rocks in Tarim basin, Yuertusi source rock, whose thermal evolution history is still lacking of objective knowledge which restricting the choice of exploration direction. On the basis of drilling data and analysis test, the Easy%R_o model of basin modeling technology was used to analyze the thermal evolution history and its dissimilarity of Yuertusi source rock in different tectonic units, and the favorable exploration areas were raised, that was important to the further deep carbonate reservoir exploration. The results showed that the source rocks with multiphase and differences dynamic characteristics in thermal evolution were controlled by tectonic movement and hydrothermal activity. The source rock in the ring with depression of Manjiaer and Tanggubasi entered the hydrocarbon generation threshold successively in Ordovician, but the source rock in the Kongquehe slope and eastern Guchengxu uplift entered the stagnation of hydrocarbon generation in Silurian. The Shunxi to Manxi area entered the stage of hydrocarbon generation dried up in Permian and Carboniferous and the range of depletion has gradually expanded. The thermal evolution process of the source rock in the eastern Maigaiti slope significantly was later than that of other areas; it was still in the late mature stage today. The predicted favorable zones were west Shaya uplift, west lower uplift of Shuntuoguole, east Maigaiti slope and west Tanggubasi depression slope.

Key words: Tarim, Yuertusi formation, thermal evolution modeling, exploration favorable area

CLC Number:

TE122

Zheng Jianchao,Li Bin,Liu Yiling,Xiao Pengcheng,Li Qiqi. Study on thermal evolution modeling of lower Cambrian Yuertusi source rock, Tarim Basin[J].Reservoir Evaluation and Development, 2018, 8(6): 7-12.

Figures/Tables 7

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References 21

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井名	地质年代
井名	K	J	T	P	C	S	O_2-3	∈_2-3
YL1	120		400	50	270	1 190	470
YQ6	200	85	510	110	250	820	400
XH1	1 450		600	160	430	1 230	620	580
Aman1	300		365	1 250		350	720
Mancan1	130	95	350	1 520
TD1	125	115	260	65	385	1 050	555
Tangcan1	155		225	750		110
YB1	230		85	550		125	605
PSB2	220		5			1 020	950

地质年代	主要沉积环境	古水深/m
T-Q	半深湖、滨浅湖、河流	0~45
S-P	滨浅海、滨海平原、滨岸潮坪、河流—三角洲	0~130
O_2-3	半深海盆地、浅海开阔台地	0~500
∈-O_1-2	深海盆地、浅海局限台地	10~930

构造位置	成熟时期
构造位置	生烃门限	成熟门限	晚成熟门限	湿气门限	干气门限	生烃枯竭限
孔雀河斜坡	O¹₂	O³₂	O¹₃	S¹₂
沙雅隆起中东部	∈²₂	∈³₂	O³₁	O²₂	S²₂
沙雅隆起西部	N¹₁	N¹₁	N²₁	N³₁	N²₂
顺托果勒低隆西部	O²₁	O¹₂	S¹₁	D¹₁	C²₁	P¹₂
满加尔坳陷西部	O¹₂	O¹₃	S¹₁	S²₁	S¹₃	C¹₁
古城墟隆起东部	O¹₃	S¹₁
塘沽巴斯坳陷西北缘	O²₁	O¹₃	S¹₂	C¹₂	P³₁
麦盖提斜坡东部	C³₁	P²₂	N²₁
麦盖提斜坡西部	O¹₃	S¹₁	P¹₁	P¹₃	N¹₁

Study on thermal evolution modeling of lower Cambrian Yuertusi source rock, Tarim Basin

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