Oilfield Cementing

Tam sim no daim ntawv thov Scenario ntawm Well Cementing Chemicals

01.Roj thiab Gas Wells

Zoo cementing chemicals ua lub luag haujlwm tseem ceeb hauv kev tsim cov roj thiab roj qhov dej. Cement slurries, uas yog ib qho tseem ceeb ntawm cov cementing zoo, yog tsim nrog ntau yam tshuaj kom tau raws li cov kev xav tau ntawm engineering sib txawv. Dispersants yog siv los txhim kho cov kua dej ntawm cov cement slurries, kom ntseeg tau yooj yim nqus mus rau hauv qhov dej. Cov tshuaj no tiv thaiv cov cement particles los ntawm kev sib sau ua ke, tso cai rau kev sib xyaw ua ke ntau dua. Piv txwv li, nyob rau hauv qhov tob - hiav txwv roj thiab roj qhov dej, qhov twg siab - siab thiab qis - kub tej yam kev mob yeej, tshwj xeeb dispersants yog tsim los tswj lub twj tso kua mis ntawm cov cement slurry nyob rau hauv cov xwm txheej heev.

Retarders yog lwm yam tseem ceeb ntawm cov tshuaj cementing zoo. Nyob rau hauv ntev - nyob deb zoo - cementing kev khiav hauj lwm los yog nyob rau hauv lub qhov dej nrog siab hauv qab - qhov kub, retarders yog ntxiv rau cov cement slurry los tswj lub sij hawm teem. Qhov no yog qhov tseem ceeb vim nws muab sijhawm txaus rau cov slurry kom muab tso rau hauv qhov dej kom zoo ua ntej nws hardens. Hauv qee qhov dej kub hauv qhov dej, qhov twg qhov kub tuaj yeem ncav cuag ntau pua degrees Celsius, qhov kub thiab txias - resistant retarders yog siv los xyuas kom meej tias cov cement slurry tseem nyob rau hauv lub xeev ua hauj lwm thaum lub sij hawm siv cov txheej txheem.

02.Geothermal Wells

Nyob rau hauv geothermal zoo tsim, zoo cementing chemicals ntsib cov teeb meem tshwj xeeb vim qhov kub thiab txias thiab corrosive ib puag ncig. Cov cement siv nyob rau hauv geothermal qhov dej yuav tsum muaj kev kub ntxhov thiab tshuaj lom neeg ruaj khov. Cov additives tshwj xeeb tau muab tso rau hauv cov cement formulation los txhim kho nws cov kev ua tau zoo. Piv txwv li, silica fume feem ntau ntxiv rau cov cement slurries rau qhov dej kub hauv qhov dej. Silica fume reacts nrog calcium hydroxide nyob rau hauv cov cement matrix ntawm qhov kub thiab txias, tsim ntxiv calcium - silicate - hydrate gel, uas txhim kho lub zog thiab kav ntev ntawm cov cement ntawm qhov kub siab.

Corrosion inhibitors kuj tseem ceeb hauv geothermal zoo cementing. Cov kua dej kub, acidic nyob rau hauv geothermal reservoirs tuaj yeem cuam tshuam cov cement sheath. Cov tshuaj xws li cov organic amines thiab phosphates yog ntxiv rau cov cement slurry los tsim cov yeeb yaj kiab tiv thaiv ntawm cov cement, tiv thaiv lossis txo tus nqi corrosion. Qhov no yuav pab kom muaj kev ncaj ncees ntawm lub qhov dej thiab ua kom lub sijhawm ua haujlwm ntev ntawm lub qhov dej hauv qhov dej.

03. Dej Dej

Rau cov dej hauv qhov dej, lub luag haujlwm tseem ceeb ntawm cov tshuaj cementing zoo yog los xyuas kom muaj kev sib cais ntawm cov dej sib txawv thiab tiv thaiv kev sib kis ntawm cov dej. Sealants yog siv los tsim ib lub foob kaw ntom nti ntawm lub qhov dej thiab cov pob zeb nyob ib puag ncig. Qee zaum, bentonite-raws li sealants raug siv. Bentonite swells thaum nws los rau hauv kev sib cuag nrog dej, sau tej qhov khoob lossis pob txha hauv phab ntsa hauv qhov dej thiab muab lub foob zoo. Qhov no yog qhov tshwj xeeb tshaj yog nyob rau hauv dej - muab cov qhov dej, qhov uas tswj cov dej zoo yog qhov tseem ceeb tshaj plaws.

 

Cov kev sib tw uas twb muaj lawm hauv kev siv cov tshuaj Cementing zoo1. Kev txhawj xeeb ib puag ncig

Ntau cov tshuaj cementing zoo ib txwm muaj cov hlau hnyav lossis lwm yam khoom tsis zoo rau ib puag ncig. Piv txwv li, qee qhov retarders thiab accelerators tuaj yeem muaj chromium, uas yog cov hlau hnyav hnyav. Thaum cov tshuaj no tso tawm thaum lub sijhawm ua haujlwm zoo - kev ua haujlwm cementing lossis dhau lub neej ntawm lub qhov dej, lawv tuaj yeem paug cov av thiab dej. Nrog rau kev nce ntxiv ntawm kev tiv thaiv ib puag ncig, muaj kev xav tau los tsim kom muaj kev sib raug zoo ntawm ib puag ncig zoo - cementing chemicals .

2. Kub - Kub thiab Siab - Siab Siab

Raws li kev tshawb fawb ntawm cov roj, roj, thiab cov khoom siv hluav taws xob hauv av tau txav mus rau qhov tob thiab nyuaj geological formations, cov txheej txheem cementing yuav tsum tiv taus qhov kub thiab txias heev. Muaj qhov zoo - cov tshuaj cementing yuav tsis tuaj yeem tswj xyuas lawv cov kev ua tau zoo nyob rau hauv qhov chaw hnyav. Kev tsim cov tshuaj uas tuaj yeem ua haujlwm tau zoo hauv qhov kub siab tshaj 200 ° C thiab siab tshaj 100 MPa tseem yog qhov nyuaj heev.

3. Cov teeb meem kev sib raug zoo

Qee zaum, qhov sib txawv zoo - cov tshuaj cementing yuav tsis sib haum nrog ib leeg. Piv txwv li, qee qhov dispersants yuav hnov ​​​​mob nrog retarders hauv txoj kev npaj txhij txog, ua rau muaj kev hloov pauv hauv cov khoom rheological ntawm cov cement slurry lossis txawm tias qhov chaw ntxov ntxov. Ua kom muaj kev sib raug zoo ntawm ntau yam tshuaj hauv cov cement complex - slurry systems yog ib qho tseem ceeb rau kev ua tiav zoo - cementing hauj lwm.

Kev Txhim Kho Kev Cia Siab ntawm Zoo Cementing Tshuaj

1. Ntsuab thiab Sustainable Tshuaj

Nyob rau hauv lub neej yav tom ntej, yuav muaj kev tsom mus rau kev tsim kom zoo - cementing chemicals uas yog ib puag ncig tus phooj ywg thiab ruaj khov. Qhov no suav nrog kev siv biodegradable polymers li additives hauv cement slurries. Piv txwv li, qee cov kws tshawb fawb tab tom tshawb nrhiav kev siv cov khoom siv ntuj tsim xws li chitosan hauv kev siv cov cementing zoo. Chitosan yog biodegradable, tsis muaj tshuaj lom, thiab muaj cov yeeb yaj kiab zoo - tsim cov khoom, uas tuaj yeem muaj peev xwm txhim kho kev sib khi ua haujlwm ntawm cov cement slurries tsis ua rau muaj kuab paug ib puag ncig

2. Nanotechnology - Siv tshuaj lom neeg

Nanotechnology muaj peev xwm ua tau zoo rau kev txhim kho kev ua haujlwm zoo - cementing chemicals. Nanoparticles tuaj yeem ntxiv rau cov cement slurries los txhim kho lawv cov khoom siv kho tshuab, xws li lub zog thiab tawv. Piv txwv li, nanosilica hais tuaj yeem sau cov micro - pores nyob rau hauv cov cement matrix, txo nws cov permeability thiab txhim kho nws tsis kam mus rau hnyav ib puag ncig. Tsis tas li ntawd, nanoparticles tuaj yeem ua haujlwm kom ua tiav cov haujlwm tshwj xeeb, xws li kev kho tus kheej hauv cov cement sheath. Yog tias cov ntaub ntawv tawg hauv cov cement vim kev ntxhov siab sab nraud, cov khoom siv nanoparticles tuaj yeem tso cov tshuaj kho kom kho qhov tawg, ua kom lub sijhawm ntev ntawm lub qhov dej.

3. Ntse Chemical Systems

Txoj kev loj hlob ntawm ntse zoo - cementing chemical systems yog lwm txoj kev vam meej. Cov tshuab no tuaj yeem teb cov kev hloov pauv hauv qhov chaw zoo, xws li kub, siab, thiab tshuaj lom neeg muaj pes tsawg leeg. Piv txwv li, nws tus kheej kho cov cement - slurry systems tuaj yeem tsim los hloov lawv lub sijhawm teem sijhawm lossis cov khoom siv rheological hauv kev teb rau kev hloov pauv hauv qhov kub thiab txias. Qhov no tuaj yeem txhim kho qhov zoo - cementing txheej txheem thiab txhim kho qhov zoo ntawm cov cement sheath, tshwj xeeb tshaj yog nyob rau hauv complex geological formations.

Hauv kev xaus, cov tshuaj cementing zoo tau siv dav hauv ntau qhov chaw zoo - kev tsim kho, tab sis lawv kuj ntsib ntau yam teeb meem. Txawm li cas los xij, nrog kev txhim kho txuas ntxiv ntawm thev naus laus zis, lub neej yav tom ntej ntawm cov tshuaj zoo- cementing zoo li cog lus, nrog rau kev tsom mus rau ib puag ncig tus phooj ywg, kev ua haujlwm siab hauv cov xwm txheej huab cua, thiab kev txhim kho ntawm cov ntse thiab qib siab chemical systems.