Chongqing Wuxi Shale Gas Luye 1# Well

Release time:

2024-10-18

2021 Chongqing One Three Six Minerals Company

Geological Design

Well number: JKZ-1, design hole depth 1950.0m, coring diameter 102mm

Overview of final hole

Construction from August 2020 to July 2021, depth 2555.18 m, aperture 127mm, core diameter 80mm

Equipment

Large DB30 intelligent drilling rig, drilling platform, blowout preventer

Formation information

Upper sandy mudstone and silty sandstone, central dolomite and limestone, lower granite, black penstone shale

Construction characteristics

Open-hole Ordovician and Cambrian strata; loose, broken, falling and collapsed strata are easy to get stuck in drilling; water gushing, water leakage,
The leakage formation is easy to burn and drill, and drill pipe deviation occurs; continuous construction of 400m thick multi-layer coal formation

Drilling process scheme

Drilling tool configuration

Process technology point

open

openings: openingsO216 single pipe drilling tool

0216 diamond drill bit

1. Ensure drilling accuracy and avoid diameter reduction

The influence of different strata on drilling,JS150 rope

Cable drilling tool extension drilling to reach1500m, well done

Guide column for next stage extension drilling

2. P-caliber drilling tools adopt large annular clearance to ensure

Effective discharge of large particle cuttings

 

Orifice tube: depth approx.35m

0178 casing

Second opening

Drilling in:JS150 wireline coring tool

JS150 drilling tool JS150 diamond bit

 

Technical casing: depth approx.1500m

O146 casing 0146 boot

Three open

Drilling in:CHD127 rope core drilling

Process, drilling to final hole2555.18m

CHD127 rope core drilling tool CHD127

diamond drill bit

Carcass typePD Drill Bit Gear Drill Bit

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