The Relationship between Diagenetic Evolution and Hydrocarbon Charge in Deep Tight Reservoirs: A Case Study from Kepingtage Formation of S9 Well Block in Tarim Basin

Table 1

Summary point count data and sample petrophysical properties.

(a)

Well	Depth	Petrofacies	Textural characteristic			Thin section porosity (%)			Core measurement
			Sorting (class)	Roundness (class)	Median grain size (μm)	Total	Primary	Secondary	Porosity (%)	Permeability (mD)
S9	5578.95	A	G	SA-SR	266	4.4	3.2	1.2	8	0.51
S9	5580.1	B	G	SA-SR	164				1.4	0.01
S9	5581.22	A	M	SA-SR	264	2.8	1.9	0.9	7.5	0.53
S9	5584.37	A	G	SA-SR	248	3.6	3	0.6	9	0.4
S9	5584.75	A	G	SA-SR	228	2.2	1.6	0.6	7.5	0.26
S9	5586.43	B	G	SA-SR	157				2.3	0.05
S9	5605.41	B	G	SA-SR	159	0.3	0.3		5.3	0.02
S901	5503.84	B	G	SA-SR	179				2.9	0.02
S901	5508.72	A	G	SA-SR	220	0.5	0.5		6.1	0.05
S901	5512.08	A	G	SA-SR	257	2.8	2	0.8	9.2	0.15
S902H	5516.07	A	G	SA-SR	264	0.7	0.7		5.8	0.18
S902H	5522.31	A	G	SA-SR	221	1.2	0.7	0.5	7.51	0.09
S902H	5522.81	A	G	SA-SR	220	1.9	1.6	0.3	7.55	0.23
S902H	5517.17	A	M	SA-SR	228	0.5	0.5		5.4	0.23
S902H	5527.09	A	G	SA-SR	208	1.2	0.9	0.3	7.7	0.09
S902H	5527.16	A	G	SA-SR	200	0.5	0.5		7.2	0.13
S902H	5528.79	A	G	SA-SR	253	2.3	1.5	0.8	8.1	0.44
S903	5576.52	B	G	SA-SR	146				2.1	0.11
S903	5580.36	A	M	SA-SR	230	1.3	0.7	0.6	7.4	0.84
S903	5593.97	B	G	SA-SR	153				2.9	0.05
S903	5603.48	A	G	SA-SR	250	3.3	1.9	1.4	7.9	0.1
S904	5574.15	A	G	SA-SR	251	2.4	1.6	0.8	8.8	0.07
S904	5576.58	A	G	SA-SR	225	2.1	1.4	0.7	8	0.2
S10	5692.86	A	G	SA-SR	220	1.7	1.5	0.2	7.8	0.15

(b)

Well	Depth	Detrital grains (%)					Authigenic minerals (%)			Clay minerals (%)
		Quartz	Feldspar	Rock fragment	Pseudomatrix	Ductile grains	Quartz overgrowth	Calcite	Clay minerals	I/S	It	C	I/S,S
S9	5578.95	42.1	8.5	49.4	2.5	16.1	2.1	0.3	1.5
S9	5580.1	28.1	5.8	66.1	25.6	28.6			5.0	25	24	51	20
S9	5581.22	40.5	3.8	55.7	4.8	12.8	2.1	1.0	1.0
S9	5584.37	48.6	6	45.4	3.3	11.6	0.7
S9	5584.75	38.4	7.2	54.4	5.5	15.4	2.0	0.8	2.0
S9	5586.43	31.4	2.3	66.3	16	25.7			4.5	50	24	26	20
S9	5605.41	30.7	6.8	62.5	14.6	24.1	0.2		4.0	20	20	60	15
S901	5503.84	32.8	5.4	61.8	12.3	21.6			5.0	54	36	10	20
S901	5508.72	42.3	5.7	52	8.4	17.8	3.3	0.1	1.0	31	18	51	15
S901	5512.08	53.6	8.1	38.3	3.1	10.7	1.3
S902H	5516.07	41.3	6	52.7	2.7	12.3	4.5		2.0	46	29	17	20
S902H	5522.31	37.5	8.1	54.4	4.5	16.7	1.6		2.5	29	18	53	15
S902H	5522.81	48.3	2.6	49.1	6.5	17.1	0.6			30	10	60	15
S902H	5517.17	33.7	5.2	61.1	13.1	20.6	0.4	1.2	1.0	45	21	34	15
S902H	5527.09	48.9	4.7	46.4	8.6	19.3	2.1
S902H	5527.16	46.9	6.1	47	4.2	14.6	1.6
S902H	5528.79	52.3	5.9	41.8	3.3	11.8	3.1	0.5
S903	5576.52	26.8	4.1	69.1	19.5	26.5				34	33	33	20
S903	5580.36	46.4	7.2	46.4	2	12.9	2.1		0.5	25	28	47	15
S903	5593.97	31.7	5.6	62.7	16.9	24.8				20	13	67	15
S903	5603.48	49.5	5.7	44.8	4.1	14.3	2.0			26	14	60	15
S904	5574.15	49.3	4.9	45.8	5	13.8	1.8		2.0
S904	5576.58	45.6	6.7	47.7	4.3	14.1	1.3	0.3	1.5
S10	5692.86	35.7	5.2	59.1	3.7	15.6	1.7		1.0	22	20	58	15