Time: August 23rd to September 4th, 2015 and October 17th to October 27th, 2015
Location: Group 2, Guanyinjing Village, Laisu Town, Yongchuan District, Chongqing City
Construction location: Southeast slope of Yongchuan Xindianzi structure in the southern low fold of Sichuan Basin
Project Overview:
Yongye-1HF well is a horizontal shale gas development well drilled by Sinopec Chongqing, located on the southeast slope of the Yongchuan Xindianzi structure in the southern fold of the Sichuan Basin; The construction well sections are 3605-3782 meters and 5116-5536 meters; The designed wellbore inclination is 90 degrees, and this well is an important pre exploration well for LWD drilling shale gas in Chongqing.
Construction Overview:
1) The geological conditions of the block to which Yongye-1HF well belongs are complex, and the drilling fluid belongs to oil-based mud with high density and high temperature. The first time using Zhongtian Qiming instrument, the 3605-3783m well section was successfully completed through two drilling trips. Before the second use of the instrument, using Baker Hughes' LWD instrument, there were six consecutive drilling trips where there was no signal during the instrument testing, and the instrument data was inaccurate, which seriously affected the normal construction of this well. There was no footage for half a month. In this situation, the Zhongtian Qiming LWD (650) was decisively adopted to successfully complete the well section 5116-5265 meters.
2) Our company's LWD downhole measurement data is compared with Baker Hughes' downhole data, and the resistivity, gamma, inclination, azimuth, and other data are basically consistent.
Customer review:
The Yongye-1HF well was successfully completed on October 27, 2015, which efficiently matched the service life of other drilling tools, effectively reduced the drilling cost of a single well, and bought time for drilling in Chongqing. At the same time, our company's LWD instrument data was compared with Baker Hughes' data, successfully verifying the accuracy and stability of our company's data, proving that our company's LWD has taken another solid step forward.