Tuygn tap bao cao Hgi nghj KHCN "30 nam Dgu khi Viet Nam Co" hoi moi, thach thiic moi" 703 VAN DE TIET KIEM NANG LlTONG VIA, DIEU CHINH KHAI THAC, NANG CAO HE SO THU HOI DAU Pham Quang Ngoc, Le Huy, D[.]
Tuygn tap bao cao Hgi nghj KHCN "30 nam Dgu Viet Nam: Co" hoi moi, thach thiic moi" 703 V A N D E TIET KIEM NANG LlTONG VIA, D I E U C H I N H KHAI T H A C , NANG CAO HE SO THU HOI D A U Pham Quang Ngoc, Le Huy, Dao Nguyen Hung XNLD Vietsovpetro N237_V(53) TOM TAT Ndng lugng via c& mdi quan hi ddc bid v&i qud trinh khai thac ddu khi, dnh hudmg true tiip din sdn lugng vd hiiu qud khai thde Ndng lugng via cd nhiiu dgng: ndng lugng cdt dp nu&c ria, ndng lugng dan hdi cua chdt luu vd dd chira, dp luc bi nen, su gidn no cua (hod tan ddu), luc trucmg cua ddu, ndng lugng biin thiin bin thdn ddu vd cdc pha chdt luu (ddu, nu&c, khi) Ndng lugng via dugc de cap & ddy la dp sudt via (thuy tinh), tdc nhdn quan nhdt tdc ddng lin cd qud trinh khai thde cdc thdn ddu Vdn di tiit kiim ndng lugng via tir tru&c din chua dugc nghiin cim day du Tiit kiim ndng lugng via dugc dgt v&i muc dich sir dung ndng lugng item chua cdc thdn ddu c& hiiu qud, diiu chinh khai thde ndng cao hi sd thu hdi ddu AP SUAT VIA BAN DAU Ap suat via ban dau la th6ng s6 d6ng vai tro quan trong viec thiet ke va phan tich khai thac cac mo dau Ap suat via ban dau phan anh tiem nang ve nang lugng ma d6i tugng khai thac co dugc, tren co so d6 dua nhimg phuong an c6ng nghe phii hgp vai thuc te cua mo Ap suat via ban dau dugc xac dinh bang cac thiet bi ap sau Ap suat via ban dau ciia tang mong mo Bach H6 la 417at C) sau tuyet d6i -3650m (diem gitra than dau) SU* SUY GIAM NANG LLTONG VIA TRONG QUA TRINH KHAI THAC Nang lugng via bi suy giam su6t qua trinh khai thac viec day chat luu tir than dau len be mat T6ng nang lugng de dua chat luu len be mat co: nang lugng diing de thang lire can thiiy luc va day chat luu len be mat la nang lugng co ich, c6n ap suat mieng ciia cac gieng khai thac PM la phan nang lugng du thira, kh6ng the dua tro lai via va bi mat qua trinh khai thac Nang lugng via bi mat the hien su suy giam ap suat via va ap suat mieng tai cac gieng khai thac Van de tiet kiem nang lugng via dugc dat nham dieu chinh khai thac nhu the nao de phan nang lugng P^ bi mat it nhat, tri ap sudt via a mirc can thiet De danh gia sir suy giam nang lugng via qua trinh khai thac, co thi sir dung he sl suy giam nang lugng via KM: 704 VSn de tigt kiem nSng lu'OTig via, digu chinh khai thac, nang cao he so thu hoi dau Trong do: APv: Hieu ap suht via gitra hai thai diem khao sat, QD, QN^ QK^ Ltrgng dhu, nuoc, tuong ung, khai thac duge khoang thai gian nghien cuu (QK - ap suat via bi suy giam N I U ap suht via dugc nang cao ban thoi gian truoc nho bom ep thi he s6 suy giam se co gia tri am (KN < 0) Dong thai suy giam ap suht via theo thai gian ciia kh6i Trung tam tang mong mo Bach H6 dan o Bang Bang 1988 AP, at Qo.tr.ng.t 0,49 1996 KN 1990 7,4 KN AP, at Qo.tr.ng.t 1989 4.01 65.77 0.0610 16,6 20,82 0,7968 8,06 0,918 1997 1.9 80.91 0.0235 1991 1,1 32,40 0,0339 1999 1998 -0.6 94.60 -0.0063 6.5 99.84 0.0651 1992 1993 1994 46,4 45,69 1,0155 31,2 51,94 0,6007 24,6 56,49 0,4355 2000 -0.5 106.68 -0.0046 2001 2002 1995 2,2 51,06 0,0431 2003 0.1 0.1 1.3 114.79 0.0009 114.80 0.0009 110.88 0.0117 Tir Bang thay ro giai doan chua bom ep nuac vao tang mong kh6i Trung tam (1988 - 1993), sir suy giam ap suat via kh6ng ty le voi san lugng dau thu h6i la ban kinh huy dong dau tang dan kh6ng deu va phu thuoc vao tinh chat bat d6ng nhat ciia than dau, gay sut ap tam thai Nang lugng via suy giam manh nhat nam 1992 va m6i mot tram ngan tan dau dugc khai thac da lam ap suat via suy giam 1,0lat Hai nam 1998 va 2000 kh6i lugng nuac bam ep kha Ion, da bu vugt lugng chAt luu khai thac, vi vay he s6 suy giam ap suat via mang dau am He s6 suy giam ap suat via cung cho phep xac dinh t6c suy giam ap suat via theo thai gian (Bang 1) TON THAT NANG LLTONG TAI CAC GIENG KHAI THAC T6n that nang lugng via the hien true tiep qua nang lugng thoat tir mieng cac gieng khai thac Phan nang lugng mht di keo theo su suy giam ap suht via T6n that nang lugng tai cae gieng khai thac dugc xac dinh theo c6ng thirc sau: Trong do: Pp: ap su4t day, Fjp cot ap thiiy tmh, PMS: Ivc ma sat, PCD: Itrc day T6n that nang lugng chung gilng khai thac lam viec dugc xac dinh theo c6ng thirc: K, P,M Z(QO+QK+Q.) (4) Tuygn tap bao cao HQi nghj KHCN "30 nim Dau Viet Nam: Co hoi m6i, th^ch thirc moi" 705 D6i voi pha dau, he sl tin that nang lugng se la: Ap dung cac c6ng thuc (4) va (5) de dang xac dinh dugc t6n that nang lugng cua cac gieng khai thac Co the xac dinh he sl san pham theo quan diem moi ve t6n that nang lugng, la san lugng dau thu dugc tren m6i mot don vi ap suat bi mat di a mieng gieng khai thac He s6 san pham cua gilng khai thac duoc xac dinh theo c6ng thiic sau: , = ^ (6) Tir c6ng thuc (5) va (6) thay ro he s6 t6n that nang lugng bSng nghich dao cua he sl san pham Ro rang san lugng d4u thu h6i co quan he chat che vol nang lugng t6n that mieng gieng Vai khai niem he s6 san pham moi, cho phep giai thich vi vai chenh ap rat nho gitra ap suat via va ap suat day (~ 0,5at.) cua gieng s6 tang mong m6 Bach H6 lai co the cho san lugng dau khai thac rat Ion ( ~ 1470 tan), vi ap suat mieng kha Ion (136at thang 5/1990) Trong truong hgp he s6 t6n that nang lugng cua gieng s6 Xo2 tai thai diem khao sat la KQ = 0,0925at./t., c6n he s6 san pham se la Ks = 10,8t./at Phan tich s6 lieu khai thac thang 12/2003 cua tang mong mo Bach Ho thay ro cac gilng khai thac co he s6 tin that nang lugng ldn nhu: X0450, X0474, Xo467, Xo46o, Xo6i, Xo69, X091, X08095 Xo8i8- Nhung gieng khai thac co he s6 t6n that nang lugng be nhu: X02, X0403, X0407, Xo4ii, Xo42i, Xo43o, X0491, X07001, X07002, V.V Hc sl tin that nang lugng ciia cac gilng khai thac a tang mong mo Bach H6 dao dgng khoang tir 0,043 ^ 48 va cua he s6 san pham la 0,02 ^ 23,21 Gia tri cua nhiing he s6 thay d6i theo thai gian va phu thuoc vao su bien doi cua ap suat via, viec dieu chinh khai thac tai nhiing gieng cu the Viec xac lap he th6ng he s6 t6n that nang lugng va he s6 san pham theo quan diem mai cho phep de dang danh gia hieu qua lam viec cua cac gieng khai thac Sir MAT NANG LU'QfNG AP SUAT MIENG CUA CAC GIENG KHAI THAC Khi dua gilng vao khai thac, moi gieng co mot gia tri ap suat mieng ban dau Ap suat mieng co the tang giam nho dieu chinh khai thac Tuy nhien xu huong chung la suy giam theo thai gian Khi nuoc xuat hien san pham thi ap suat mieng suy giam ro ret Cac gieng khai thac ciia tang mong khoi Trung tam mo Bach Ho co ap suat mieng ban dau kha cao (tren 180at.) Gia tri ciia no suy giam theo thofi gian va nuoc xuat hien san pham thi ap suat mieng ciia cac gieng khai thac giam xu6ng thap Phan tich gia tri ap suat mieng cac gieng khai thac bi ngap nuac X0409, X0415, X0417, X0419 chiing ta co nhan xet: ap suat mieng giam xuong x4p xi 20at thi tk ca cac gilng dugc khao sat diu cham dirt boat dong (Hinh I) Nhu vay, m6i gieng khai thac co mot gia tri ap suat mieng toi ban xac dinh, giam din gia tri gieng se ngimg boat dong 706 van dg tilt kiem nang luong via, dieu chinh khai thac nang cao he so thu hoi dau 9.1989 8.1990 7.1991 6.1992 5.1993 4.1994 3.1995 2.1996 1.1997 12.1997 11.1998 10.1999 9.2000 8.2001 7.2002 6.2003 THdlGIAN -X02-Pm -X0417-Pm - X0409-Pm -X0415-Pni -X04I9-Pin Hinh 1: Su- suy giam ap suat mieng ciia cac gieng khai thac tang mong mo Bach Ho DIEU CHINH KHAI THAC THEO QUAN DIEM TIET KIEM NANG Ll/ONG VIA Trong qua trinh khai thac dau, mot s6 gieng co luu lugng rat be (~ t./ng.d.) van duge tri che lam viec Nhtrng gilng khai thac c6 luu lugng be, hoat dong voi nhtrng ap suat mieng xac djnh da lang phi mot phan dang kl nang lugng via, hieu qua thu h6i dau thap Nang lugng via (n6i chung) ciia mot dii tugng khai thac la mot nguIn nang lugng th6ng nhat Do do, ban che phan tan nang lugng a nhiing gilng se lam tang nang lire tac dong eiia no len cac gilng khai thae kbac Khi nang lugng dugc "tap trung" tac dong len nhiing gieng lam viec tit se nang eao hieu qua khai thac De dieu chinh khai thac theo quan dilm tilt kiem nang lugng via can xac djnh he sl san pham va he so t6n that nang lugng ciia tat ca cac gilng lam viec ciia ciing mot dii tugng khai thac Tir cac cir lieu nay, so sanh xac lap cac t l hgp gilng khai thae eo he sl t6n that nang lugng nhieu hay it, tinh toan cac phuong an khai thac hgp ly De lam ro y tuong dieu chinh khai thac theo quan dilm tilt kiem nang lugng via, dan vi du cu the tinh trang khai thac ciia tang mong m6 Bach H i thang 10/2003 Co 54 gieng khai thae boat dong dii tugng Bang Chi sd khai thde trung binh, ng d Dhu % Nuoc khai thae % Ap suat mieng % Tdng mdng 100 100 100 PA-1 (ddng 13 gieng) 4.2 44 13 PA-2 (ddng 10 gieng) 0.75 10.5 7.0 Tuygn tap bao cao Hoi nghj KHCN "30 nam Phu Viet Nam: Co' hoi moi, thach thiic moi" 707 Kit qua khao sat Bang eho thdy, viec dong co lira chon 13 gilng se lam giam lugng dau thu hii 4,2%, nuoc san pham giam 44% va ap suat mieng bi mat giam 13%; nlu dong 10 gilng, kit qua tuong img la: 0,75%), 10,5% va 7% Nhu vay, lugng nuac san pham giam nhilu (44 va 10%), nang lugng via it bi mat (13 va 7%), co the giam bom ep (10 va 5%)) van bii vugt ap suat via ban dau He qua la ap suat via tang len thi lugng dau thu hii cting se co kha nang tang len Nhu vay, viee nghien cim ve nang lugng via cho phep dieu chinh t6t qua trinh khai thac than dau KET LUAN • Nang lugng via c6 vai tro quyet dinh den san lugng dau khai thac • Ap suat mieng la phan nang lugng via bi mat di kh6ng the thu h6i • Dieu chinh khai thac tren quan diem tiet kiem nang lugng via se nang cao hieu suat khai thac, giam kh6i lugng nuoc bom ep, giam chi phi san xuat • Viec dieu chinh khai thac cua nhom gieng co lira chon tren quan diem tiet kiem nang lugng via se lam tang hieu qua khai thac ciia ca than dau TAI LIEU THAM KHAO XNLD Vietsovpetro Sd lieu khai thac hdng thdng cua tdng mdng md Bgch Hd (1990 2003) ... san lugng dau khai thac • Ap suat mieng la phan nang lugng via bi mat di kh6ng the thu h6i • Dieu chinh khai thac tren quan diem tiet kiem nang lugng via se nang cao hieu suat khai thac, giam... m6i gieng khai thac co mot gia tri ap suat mieng toi ban xac dinh, giam din gia tri gieng se ngimg boat dong 706 van dg tilt kiem nang luong via, dieu chinh khai thac nang cao he so thu hoi dau... tugng khai thac Tir cac cir lieu nay, so sanh xac lap cac t l hgp gilng khai thae eo he sl t6n that nang lugng nhieu hay it, tinh toan cac phuong an khai thac hgp ly De lam ro y tuong dieu chinh khai