Oil Accumulation Model and Its Main Controlling Factors in Lower Yanchang Formation, Wuqi-Dingbianarea, Ordos Basin, China

Table 2

Relationship between the number of commercial oil wells of C8-C10 and the distance of C7.

Distance to C7 bottom (m)	0 ~ 15	15~30	30~45	45~60	60~75	75~90	90~105	105~120	Total
The number of commercial oil wells	19	12	12	8	5	6	3	2	67