English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The Fuling shale gas field is planning to reduce the well spacing (600-1300 m at the early development stage) to about 300m by infill drilling works to accelerate recovery. We first summarized the drilling troubles and accidents in the early infill-drilling practices in Fuling. And we gave two representative examples to show the challenges of infill drilling works within geostress disturbance zone. One example is about gas kick and overflow, and the other is drilling fluid pollution by fracturing fluid from neighbouring well. Moreover, two practical strategies for these drilling challenges were put forward. The disturbance of the geostress caused by multistage hydraulic fracturing of neighbouring wells within a drilling units is numerically simulated to provide data for optimized design of well spacing and well path of the infill drilling in Fuling shale gas field. Recent infill-drilling practices with the aid of these effective strategies show much better performances. For example, the average rate of penetration (ROP) of an infill well (Y29S1HF) with depth of 4245m reaches 12.02m/h, and no drilling troubles or accident occur.

Challenges and Strategies of Infill-Drilling Within Large Scale Hydraulic Fracturing Zone for Shale Gas Due to Geostress Disturbance